复数： blackboards

The box itself opens up into a sort of blackboard .

这种箱子自身在打开之后，就变成了一个黑板模样。

Make lists of these words on the blackboard .

在黑板上列出这些词语。

Teaching used to be conducted with a blackboard and a handful of tattered textbooks .

以往教学都是依靠一块黑板和一些破旧的教科书来进行的。

Outraged , he drew a hideous caricature and pinned it to the blackboard .

他愤怒地画了一张讽刺漫画，把它钉在了黑板上。

Parents watch their son draw chinese characters on a small blackboard in a child 's room .

儿童房间，年轻的父母在看他们的儿子在一块小黑板上写中国字。