Biosecurity
生物安全
🗣️ 情景例句
Don't worry. The traffic is very heavy at this hour.
别担心。这个时间交通很拥挤。
Do you work near the railway station?
你在火车站附近工作吗？
Everything's very quiet.I'm sure there's no one at home.
毫无动静，肯定家里没有人。