Radioindicator
[化] 放射性指示剂
🗣️ 情景例句
Let's go. What are your questions?
我们就进行吧。你想问哪些问题？
What kind of talk is that?
你说这什么话？
It's often cold in December, January and February.It snows sometimes.
12月、1月和2月常常很冷，有时还下雪。