Hexin
己菌素
🗣️ 情景例句
During your computer classes, did they teach you how to fix a cooling fan?
在你的电脑课程，他们是否教过你如何修理散热风扇？
She hesitated about what to do next.
他对下一步干什么拿不定主意。
Why not?
干吗不来？