Otd
[医] 器官耐受量(放射量)
🗣️ 情景例句
Is something wrong, Alexandra?
怎么了Alexandra？
I used to wake up early and get up at 7 o'clock.
我过去常早醒来并且在7点钟起床。
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。