Nuclear stain
[医] 核染剂
🧩 词语组成解析
🗣️ 情景例句
Tom's about to open the doors. Tom
准备要开门了。
Are you John's brother?
你是约翰的兄弟吗？
He had hardly had time to settle down when he sold the house and left the country.
还没等安顿下来就卖掉了房子，离开了这个国家。