医院用黄色垃圾桶专门处理生物危害废弃物。

Hospitals use yellow bins to dispose of ___bio-hazard waste specifically.

实验室工作人员必须穿戴防护服以避免接触生物危害。

Lab workers must wear protective suits to avoid exposure to ___bio-hazard.

实验室门上贴着生物危害标识，提醒人们里面有危险物质。

The lab door has a ___bio-hazard symbol to warn people about dangerous materials inside.