Radioactive isotope
[机] 放射性同位素
🧩 词语组成解析
🗣️ 情景例句
taking a vacation together--with the family.
要一起渡个假， 全家一起。
Lemonade on a hot day is very refreshing.
在暑天喝柠檬水，会使人精神抖擞。
His few material possessions make it possible for him to move from place to place with ease.
他几乎没有什么财产，这使他能够轻松自如地在各地奔波。