Ensure the guard is in place before operating the machine.

一定要在防护装置放到位后再开机器。

《牛津词典》

Triggers the smoke machine, the siren, the USB rocket launcher, and calls in the national guard.

让机器冒烟、触发警笛、USB火箭发射器，再把国民防卫队叫来。

youdao

The action of applying an offline policy to a machine is called Guard DB (Database Backup).

将离线策略应用到机器的操作称为保护数据库备份(Guard DB)。

youdao

Where a government security detail previously stood guard with machine guns, cars were parked and reporters roamed the area scratching for details.

CNN: Lawyer: Pakistani nuclear scientist freed from house arrest

MADRID, Spain (CNN) -- Spanish police vehicles topped with machine guns were standing guard outside the American, British and Israeli embassies in the Spanish capital as security was beefed up ahead of the likely war in Iraq, CNN observed Wednesday.

CNN: Spain steps up embassy security

President Clinton declared a national emergency to provide authority for Coast Guard cutters armed with mounted machine guns to defend the flotilla if necessary.

CNN: Flotilla sets off for waters near Cuba