粉笔

他用一截粉笔将她的指示写在黑板上。

With a stick of chalk he wrote her order on a blackboard .

老师用粉笔在黑板上写字。

The teacher wrote on the blackboard with a piece of chalk .

她把当天的菜单用粉笔写在黑板上。

She chalked the day 's menu on the board .

黑板上用粉笔写着7个人名。

There was a blackboard with seven names chalked on it .

他用粉笔将消息写在黑板上。

He chalked the message on the blackboard

他用粉笔在黑板上勾划出一个图样。

He chalked out a design on the blackboard .

他们用彩色粉笔在黑板上画图案。

They were drawing patterns on the blackboard in colored chalks .

她用粉笔在黑板上画出一个图样。

She chalked out a design on the blackboard .

老师用粉笔写字。

The teacher wrote with a stick of chalk .

一根白色的粉笔在黑色的黑板上写白字

A white chalk chalks white on a black blackboard .

请给我一支粉笔。

Please give me a piece of chalk .

他从小就喜欢铅笔和粉笔胜过任何的玩具。

As a baby , he liked pencils and chalks better than any of his toys .

曾为美国宇航局工作的3D粉笔画大师库特·维纳，喜欢在人行道或石子路上展开自己丰富的想象，为世界各国带来让人叹为观止的超越现实之作。

The3D Master artist and former NASA worker Kurt Wenner uses his mathematical skill to create illusions on cobbles and pavements across the world .

尽管Hammertoss需要复杂的数字技巧，但其背后的原则让人想起冷战（ColdWar）时期科技含量较低的间谍信号：树上的粉笔记号或者废弃的信箱。

For all its digital sophistication , the principles behind Hammertoss are reminiscent of the low-tech spy signals of the Cold War - chalk marks on trees or dead-letter boxes .

结果使用至诚板、笔教具上课后闪光融合频率减少值明显低于黑板、粉笔教具，差异有显著性（P0.05）；

Results The decrease in flicker fusion frequency was smaller due to the use of Zhicheng blackboard-chalk teaching aid when compared with traditional blackboard-chalk teaching aid ( P 0.05 ) .

教的许多科目都和家乡一样，但是老师使用PowerPoint和计算机教学，而不是粉笔与黑板。

Many subjects are the same as at home , but the teachers have PowerPoint and computers rather than chalk and blackboards .

检查员用粉笔在我皮包上写了O.K.。

The inspector chalked O.K.on my bag .

本文比较了现代教育技术（以PowerPoint电子讲稿为主，加之数学软件、作图工具等）和传统教学手段（粉笔加黑板）的各自优势与不足。

A vivid comparison of modern teaching technology ( represented by PowerPoint along with math software and drawing tools ) and traditional teaching tools ( chalks and blackboard ) is made in this paper .

哈佛大学的研究者们正在研究使用碳酸钙的可能性（就是粉笔和牙膏的颗粒成分）而不是二氧化硫，因为SO2会加速破坏臭氧层。而碳酸钙能够防止这种情况同时避免一些其他的风险。

At Harvard , the researchers are studying the possibility of using calcium carbonate ( the same particle found in chalk or toothpaste ) rather than sulfur dioxide ; while sulfur dioxide can speed up the destruction of the ozone layer , calcium carbonate could potentially help it and avoid some other risks .

我们还用一支粉笔做了这个实验。

We also did the experiment using a piece of chalk .

钢笔画、铅笔画、彩色粉笔画和蜡笔画；

Drawings in ink , pencil , pastel , and crayon ;

这个老师每天差不多都要用一盒粉笔。

The teacher uses nearly a box of chalk every day .

粉笔尘粒度分布的测定与分析

The Measurement and Analysis of Chalk - dust Particle Size Distribution

你可以用黑板擦把粉笔印擦掉。

You can rub out the chalk marks with the eraser .

他们正用彩色粉笔在板上描绘图案。

They were drawing patterns on the board in coloured chalks .

老师也不用粉笔在黑板上写字。

The teachers won 't write on a blackboard with chalk .

朱迪和卡伦拿起粉笔就开始写。

Judy and Karen picked up their chalk and started writing .

橱柜里有我们为孩子们准备的彩色粉笔。

We have colored chalk in the cabinet for the children .

不是她，就是我去拿些粉笔。

Either she or I am going to fetch some chalk .

他用粉笔勾画了新大楼的简图。

He chalk out a simple plan of the new building .