“to swarm”简单造句，to swarm造句子

This study trained them to swarm around the location of the scent of 2, 4-dinitrotoluene, a chemical residue left by several different types of bombs.

Organizers are expecting record crowds to swarm Washington for Obama's inauguration, with estimates of some two to five million on the streets for a parade and outdoor swearing-in ceremony.

In case of unusually heavy hopper concentrations, immediate action can be taken to make sure that the locusts never grow old enough to swarm.

Hunger drove many to swarm places where food was being given out.