单词学习：at the same time 短语/副词短语
at the same time
/ət ðə seɪm taɪm/
同时；然而，不过
Gu Laoshi was explaining the grammar point and, at the same time, writing examples on the whiteboard.
顾老师一边讲解语法点，一边在白板上写例句。
单词卡片
卡片已就绪
