International vessels must be inspected at least every six months to ensure that there are no rats on board.

国际船舶必须至少每六个月检查一次以确保船上无鼠患。

youdao

It is like when we build a new house, there are no rats, but when we fill the house with things the rats come.

就好像我们刚盖好一栋新房子时不会有老鼠，可是当我们在房子里放了一堆东西之后，老鼠就来了。

youdao

RESULTS: No rats died accidentally or for other factors in the process of experiment, finally, all the 65 rats entered the stage of result analysis.

结果：实验过程中无动物意外死亡或其他因素导致脱失，65只大鼠全部进入结果分析。

youdao

No doubt, you can turn us into creatures like rats in that way.

无疑人类可以被变成老鼠般的生物。

耶鲁公开课 - 死亡课程节选

However, a suspect in Wuxi assured China Central Television that while foxes and mink had been used in the production of fake meat, no rats had been used.

BBC: China media: Fake food scandals

The partial injury (there are no ventilators for rats, so the researchers could not completely sever the cord without killing them) allowed only one side of the diaphragm to work and the rats had trouble breathing.

ECONOMIST: Neurology

The waters likely rushed into tunnels and crevices so fast that the rats had no time to escape and many of them died.

FORBES: No Rat Exodus Reported From NYC Tunnels. Millions Of Them Likely Drowned