Diamylene
[医] 二戊烯
🗣️ 情景例句
This weekend I'm going to install a home security system.
这个周末我要装一套家庭保安系统。
We can't recall how often he's written.
我们记不起来他每隔多久写一封信。
If, at the time, the British had not feared invasion, it would have been completed.
如果不是因为那时英国人害怕入侵，隧道早已建成了。