粉笔

With his books held open by a stone, and wi th a piece of chalk gripped between the knuckles of his trotter, he would move rapidly to and fro, drawing in line after line and uttering little whimpers of excitement.

他把打开的书用石块压着，蹄子的两趾间夹着一截粉笔，麻利地来回走动，一边发出带点兴奋的哼哧声，一边画着一道接一道的线条。

What you will need: a basketball, an air pressure gauge , a pump, stepladders, chalk, a video camera, a tripod and a meter stick.

实验所需：一颗篮球、一个球压计、一个打气筒、摺梯、粉笔、一台摄影机、一个三脚架和一把米尺。

In the classic Old Holland colors no fillers such as cheap chalk, barium sulphate, aluminum hydrate powders or wax are used.

在荷兰的经典老没有填料的颜色，如廉价的粉笔，硫酸钡，氢氧化铝粉末或蜡的使用。

The teacher uses nearly a box of chalk every day.

这个老师每天差不多都要用一盒粉笔。

Then set the chalk down, address the shot in a highly focused manner, and let your body take you down.

然后设置粉笔，地址铅球在一个高度集中的方式，让您的身体需要你下来。

After all, it would be more efficient to keep the cue in the stroking hand and lay the chalk down with the free hand.

毕竟，这会更有效率，以保持线索，在抚摸，另一方面奠定了粉笔下跌与自由，另一方面。

That become short chalk, jot down years.

那一支支变短的粉笔，记载着岁月。

The use of chalk or dust clean blackboard eraser.

答：的粉笔灰尘用干净的黑板擦。

Yes, the classroom is always a comfortable working condition except some chalk dust still.

是的，课室虽然还有粉笔尘，但仍然是很舒适的工作环境。

Usually, a carver draws out the patterns and forms on paper. Then the artist cuts holes along the outlines of the design. This paper is placed on the piece of wood then covered with chalk dust.

通常，木雕师先在纸上画出图案和形状，再由工匠剪出设计图案，之后将剪纸放在待加工的木料上，用白色粉笔描线。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。