Elemene
[化] 榄香烯
🗣️ 情景例句
If we hire you, how long will you stay with us?
你打算给我们工作多久？
We can't recall how often he's written.
我们记不起来他每隔多久写一封信。
Since the sea covers the greater part of the earth's surface,
既然海洋覆盖着地球的大部分表面，