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1·I need some French chalk.

我需要一些滑石粉。

2·When used for a time, the lock may not be opened smoothly. Do not dip mechanical oil into the lock. Instead, slip some French chalk or pencil fines into it.

锁具使用一段时间后，会出现开启不顺畅的现象，不要往锁心内滴机油，将滑石粉或铅笔心的细屑滑入锁心内即可。

3·The invention provides a medicine treating tympanitis, which comprises 100g fresh eel blood, 10g earthworm dried powder, 5g musk dried powder, 2g toadfish dried powder and 50g French chalk.

本发明提出是一种治疗中耳炎的药物。由鲜鳝鱼血100克、蚯蚓干粉10克、麝香干粉5克、蟾酥干粉2克和滑石粉50克组成。

4·Of course permanency has been a problem for artists since the first prehistory artist scratched into a chalk wall in a French cave.

当然，对艺术家来说，保存永久的艺术形式是一个问题，比如说，史前艺术家以前在山洞的石灰墙上创造作品，但现在不会有人这么做了。