守护，保卫（某人）
to guard someone
Armed security officers are employed to mount guard over the president. 雇用武装保安人员来保护总统。
They had the task of mounting guard over his body.
He mounted guard at the door.
A court official had already mounted guard on the doorstep.
Police had to mount guard over the former leader's statue to prevent its removal by the crowd.
See also: mount verb (GUARD)