Biosecurity
生物安全
🗣️ 情景例句
The robber struck him on the head.
强盗打他的头。
I'm sorry, but I didn't catch what you said.
对不起，我没有听明白你的话。
Here you are, Jim. You must look after your clothes!
给你，你要好好保管你的衣服呀！