Some cleaned the blackboards, others mopped the floor.

有些人擦黑板，有些人拖地板。

youdao

We particularly like the kitchen, with the blackboards as cupboard doors and we find it is an inspiring idea.

我们尤其喜欢用的黑板作为厨房橱柜门，我们发现这是一个鼓舞人心的想法。

youdao

Now this classroom was very old, and the blackboards, which had been nailed on to the walls with old black iron nails, had become loose over the years.

㗕上课的教室已十分破烂，黑板是用那些老式的黑铁钉钉在墙上的。经过这么多年，钉子已经松动了。

youdao

So that's what we are going to focus on, and you will find out that the laws of physics for this entire semester certainly can be written on one of those blackboards or even half of those blackboards.

这就是我们的课程重点,而且你将来会发现,整个学期的全部物理定律,最多也只能写满一块黑板,或者半块黑板

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