Kitasamycin
北里霉素
🗣️ 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。
I'm not accustomed to going out after dark.
我不习惯在天黑了以后去外面。
We need three times as much as we originally ordered.
原来的三倍。