小黑蚁是大自然的清道夫英语知识小品
小黑蚁是大自然的清道夫英语学问小品
The Small Black Ants，Natures Clean—up Crew
The small black ants that we see running back and forth in the grass are the same ants that annoy us by coming to our picnics uninvited．They are not trying to make pests of them－selves，but are only doing the housekeeping job they were made for．They are natures clean－upcrew．
One of these ants，scouting in the grass，finds the trail of an injured beetle．In some mysterious way the news spreads．Soon there are two ants，then  ...