Nonradioactive
n. 非放射性
🗣️ 情景例句
Okay, I know just what you mean.
嗯，我明白你的意思。
Do you know when the next exam is?
你知道下次考试在什么时候吗？
and in the course of a few hundred miles reaches the true ocean floor at 2,500-3,500 fathoms.
一直延伸到几百英里远深达2，500至3，500的地方，