Polystat
[医] 多种变流器
🗣️ 情景例句
I ventured to correct the teacher's mistake.
我鼓起勇气去纠正老师的错误。
This man digs foundations for skyscrapers.
这个人在挖着高层大楼的地基。
They can't pick up the small pieces with their fingers.
他们用手指拿不起小零件。