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Parents think our timeline is pretty good, having a strong hands on ability and a meticulous introduction. They also think the text and typesetting are quite excellent, but they also said that sometimes when we are presenting, our sound is too quiet.

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家长们认为我们的时间线相当不错，有很强的实践能力和一丝不苟的介绍。他们还认为文本和排版相当出色，但他们也说，有时当我们演示时，我们的声音太小了。

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time line 非常好

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想想末来的笔会发展成什么样？

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想想末来的笔会发展成什么样？

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孩子们的介绍非常棒，让我了解了笔的文化！

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孩子们的介绍非常棒，让我了解了笔的文化！

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小朋友们动手能力强，介绍细致，愿意展示自

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小朋友们动手能力强，介绍细致，愿意展示自己！

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Very interesting, we’ve learned lots of knowledge today, good job! 👍👍👍

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笔的进化了解的非常好，就是同学们的声音有

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笔的进化了解的非常好，就是同学们的声音有点小，文字，排版部分做的相当出色。👍

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We use pens to write our grocery lists, jot notes at the office, and sign checks and paperwork. Maybe you've even used one to make a cool drawing, or to write a collection of essays.
Whatever the case, it's always good to have a pen in your bag, at your desk, or in your drawers at home.

The use of the pen is to write, draw, make marks, draw eyebrows, use as bookmarks, etc. Pen is a major invention of human beings and a tool for writing or painting. Use the tip to draw symbols or pictures of colored solids or liquids (ink) on paper or other solid surfaces, and also use the fact that the hardness of the solid tip is greater than that of the writing surface to engrave symbols or pictures on the surface. Nowadays, signature pens and ballpoint pens are commonly used, and pencils are used to draw artistic manuscripts and drawings. The pen is a writing tool, which can be used to learn cultural and scientific knowledge, exchange information, promote ideas, contact feelings, etc. Pen is an indispensable cultural product in life.

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We did padlet, basic information poster, schematic diagram, time line.

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做padlet ,基本信息海报，原理图，时间线。

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Promote the progress of human civilization, promote the exchange of world civilization, promote the development of education, and promote the development of art.

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促进人类的文明进步 、促进世界文明的交流 、促进教育事业的发展 、促进了艺术的发展.

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Polypropylene Copolymer (PPC)

Galvanized iron

Stainless steel

Aluminum

Tungsten

Metal alloys

Rubber

Colorants

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聚丙烯共聚物（PPC）
镀锌铁
不锈钢
铝
钨
金属合金
天然橡胶
着色剂

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Wireless pairing and charging

Magnetic adsorption

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Mechanical energy ,Potential energy ,chemical energy

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机械能，势能，化学能

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Electrical energy ，potential energy ，chemical energy

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电能、势能、化学能

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笔的最早祖先可能是公元前1千年中国人用来书写的画笔。大约公元前300年，早期的埃及人使用厚芦苇来做笔状工具。对羽毛笔的具体暗示出现在7世纪的St.的著作中。塞维利亚的伊西多尔，但这种由鸟羽毛制成的钢笔可能在更早的时候就被使用了。它们提供了以前从未实现过的程度的写作便利和控制，并在欧洲一直使用到19世纪中叶，当时金属笔和笔尖（书写点）在很大程度上取代了它们。这种装置在古典时代是众所周知的，但很少使用（在庞贝城的废墟中发现了一支青铜笔）。英格兰伯明翰的约翰·米切尔于1828年推出了机器制造的钢笔点。两年后，英国发明家詹姆斯·佩里试图通过在中央狭缝顶部切割一个中心孔，然后在两侧制作额外的狭缝来生产更灵活的钢点。

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1.pen,  tool for writing or drawing with a colored fluid such as    ink.
笔，用墨水等彩色液体书写或绘画的工具。
2.A pen is a common writing instrument that applies ink to a surface, usually paper, for writing or drawing.
笔是一种常见的书写工具，用于书写或绘图的表面，通常是纸张。

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无线配对和充电
磁力吸附

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我们用钢笔写购物清单，在办公室记笔记，并签署支票和文书工作。也许你甚至用过一个来画一幅很酷的画，或者写一本散文集。无论如何，在包里、桌子上或家里的抽屉里放一支笔总是好的。

笔的用途为写字、画画、做记号、描眉、当书签等。笔，是人类的一大发明，是供书写或绘画用的工具。多通过笔尖将带有颜色的固体或液体（墨水）在纸上或其他固体表面绘制符号或图画，也有利用固体笔尖的硬度比书写表面大的特性在表面刻出符号或图画。现今普遍使用的是签字笔和圆珠笔，绘制艺术底稿和画图则多用铅笔。笔是书写的工具，可以用来学习文化科学知识、交流信息、宣传思想、联络感情等等。笔是生活中不可缺少的文化用品。

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一次性圆珠笔
可再填充圆珠笔
棍子笔
钢笔
可伸缩钢笔
滚珠笔
Stvlus笔
凝胶笔

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Disposable ballpoint pens

Refillable ballpoint pens

Stick pens

Fountain pens

Retractable pens

Rollerball pens

Stvlus pens

Gel pens

Novelty pens

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The earliest ancestor of the pen probably was the brush the Chinese used for writing by the 1st millennium BCE. The early Egyptians employed thick reeds for penlike implements about 300 BCE. A specific allusion to the quill pen occurs in the 7th-century writings of St. Isidore of Sevilla, but such pens made of bird feathers were probably in use at an even earlier date. They provided a degree of writing ease and control never realized before and were used in Europe until the mid-19th century, when metallic pens and pen nibs (writing points) largely supplanted them. Such devices were known in Classical times but were little used (a bronze pen was found in the ruins of Pompeii). John Mitchell of Birmingham, England, is credited with having introduced the machine-made steel pen point in 1828. Two years later the English inventor James Perry sought to produce more-flexible steel points by cutting a centre hole at the top of a central slit and then making additional slits on either side.

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Whether it is drawing, taking notes or annotating documents, Apple Pencil has the same excellent experience: intuitive, accurate and wonderful. On iPad Pro, the Apple Pencil hover function also accurately shows where the tip will touch the display, which gives you a higher level of accuracy when writing, doodling and painting.
无论是画画、记笔记还是标注文档，Apple Pencil 都有着同样出色的体验：直观、精准、妙不可言。在 iPad Pro 上，Apple Pencil 悬停功能还可准确显示笔尖将在显示屏上触碰的位置，这让你在书写、涂鸦和绘画时精准度再上一级。