1.bees, locusts +成群移动；成群飞行
A dark cloud of bees comes swarming out of the hive.黑压压的一大群蜜蜂从蜂巢中涌出。
2.people +成群地涌动；蜂拥
They swarmed across the bridge.他们一窝蜂般挤过大桥。
3.to be swarming with sb
place +挤满某类人
The White House was swarming with security men.白宫挤满了安保人员。