He always made sure that any cuts were protected by sterile dressings.

他总是坚持要用无菌纱布包扎伤口。

Urine is sterile.

尿液是无菌的。

George was sterile.

乔治没有生育能力。

...a sterile male.

没有生育能力的男子

Too much time has been wasted in sterile debate.

在毫无新意的辩论上已经浪费了太多时间。