Isotopes
n. 核素；同位素（isotope的复数）
🗣️ 情景例句
The name is Stewart, Richard Stewart.
失主是Stewart Richard Stewart。
I don't have the figures, but I'll find out.
我没有这个数据，但我会找到的。
It is fairly clear that sleeping period must have some function,
很清楚，睡眠必然具有某种作用。