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1·The teacher writes on the blackboard with a chalk.

老师用粉笔在黑板上写字。youdao

2·Children like to draw on the ground with colored chalks.

孩子们喜欢用彩色粉笔在地上画画。youdao

3·This piece of chalk has a soft texture.

这块白垩质地很软。youdao

4·Chalk is very important in geological research.

白垩在地质研究中很重要。youdao

5·We use chalk to make records on the wall.

我们用粉笔在墙上做记录。youdao

6·He chalked down the accounts with a chalk.

他用粉笔把账目记了下来。youdao

7·She chalked a pattern on the stone with chalk.

她用粉笔在石头上垩了一个图案。youdao

8·There are many chalks in the classroom.

教室里有很多粉笔。youdao

9·We decorated the garden path with chalk.

我们用白垩装饰了花园小径。youdao

10·He chalked down the phone number on the wooden board with chalk.

他用粉笔在木板上记下了电话号码。youdao

粉笔

1·Snap two intersecting lines over the floor with your chalk snapline.

用你的粉笔线在地板上画两条相交的线。

2·The teacher beat chalk dust from erasers.

老师掸掉黑板擦上的粉笔灰。

3·Where is my chalk?

我的粉笔在哪里？

4·When cockroaches cross these lines, the particles of the chalk will cut them like broken glass, and they’ll soon die of dehydration.

当小强爬过这些线的时候，粉笔的粒子就会像碎玻璃一样划过它们，很快它们就会死于脱水。

5·To manipulate the display, users pick up a piece of wireless electronic chalk that can work either in contact with the surface or from a distance.

为了管理显示，用户选择一片能够在接触表面或者隔一段距离使用的无线电子“粉笔”。

白垩

1·It would become trapped inside for a long period of time, reacting with iron, calcium, and sea water in the rocks to make chalk (known more technically as carbonates).

液化二氧化碳将会在岩石中贮存很长的时间，与铁、钙以及海水产生化学反应产生白垩(即术语所说的碳酸盐)。

2·Other natural resources to be found in Belarus include peat deposits, small quantities of oil and natural gas, granite, dolomitic limestone, marl, chalk, sand, gravel, and clay.

白俄罗斯其他已被探明的自然资源包括泥炭、石油、天然气、页岩、石灰石、泥灰土、白垩、沙、砂砾、黏土。

3·Stonehenge was built by early Bronze Age farmers – who lived in homes made of wooden stakes, twigs, chalk and clay – in stages between 3000BC and 2400BC.

巨石阵是由青铜时代早期的农民，在公元前3000年至公元前2400年建造的。 当时，他们居住在由木桩、细枝、白垩和泥土等材料搭建起来的房屋中。

4·Sand on the bottom whiter than chalk

海底的沙子比白垩更白

5·Last year, about 40, 000 of the crabs washed ashore on the Thanet coast, which is a long coastline of chalk reefs in Kent, England.

去年，约有40,000只螃蟹冲刷了萨尼特海岸，这些海岸沿着英国的肯特郡(Kent)的一条长长的白垩礁海岸线。

垩

1·Under suitable density condition, protein content increased and amylose content, head rice rate and chalk grain decreased.

在适宜密度条件下蛋白质含量较高，垩白率和直链淀粉含量较低。

记下

1·You might chalk this up to optimism or blind emotion.

你或许会为乐观或盲目的感情记下这些。

(1)chalk it upv. 记帐；宣布

(1)french chalkn. 滑石粉

(1)chalk up记下；取得；归咎于

(1)a piece of chalk一支粉笔

(1)know chalk from cheese有判断力[通常用于否定句]

(1)white chalk白粉笔