The sudden appearance of a security guard caused them to drop the money and run.
保安人员突然出现，他们丢下钱就跑了。
《牛津词典》
2
Seven or eight people-some prisoners and some guard-didn't want to run away, so they came into the room and waited, too.
只有大约七八个人--包括犯人和卫兵，不愿意逃走，于是也到这个房间里一起等待。
3
The development program is expected to start in 2008 and will run parallel to the U.S. Air Force and Air National Guard F-15C AESA program already in progress.