单词学习：slave 名词/动词
slave
/sleɪv/
奴隶；苦工；完全受控制的人
The students were slaving away on their projects, but Mr. Gu reminded them to take breaks.
学生们正埋头苦干他们的项目，但顾老师提醒他们要休息一下。
单词卡片
卡片已就绪
