Polycycline
(=tetracycline)四环素
🔁 扩展释义
【化】 四环素
🗣️ 情景例句
My mom is available to baby-sit this weekend.
我妈妈在这个周末可以照顾小宝宝。
Prosperity makes friends and adversity tries them.
富裕招致朋友，困苦考验朋友。
Have they ever been there before?
他们以前去过那儿吗？