Isotopy
n. 同位素学\\n[化] 同位素学; 同位素性质
🗣️ 情景例句
A credit card is very useful when you go traveling.
当然旅游的时候，信用卡很有用。
He that regards not a penny,will lavish a pound.
小钱不知节省，大钱将滥花。
Ken gave up smoking two years ago. He'd been smoking for thirty years.
两年前肯戒了烟，之前他抽了三十年烟。