| 例句 |
Fish populations assume highly localized distributions within each river.鱼群分布集中在每条河的某些区域。She studied the effects of pollution on the fertility of the local fish population.她研究了污染对当地鱼群繁殖力的影响。Among them swam shoals of fish.鱼群在他们中间游过。In the shallow waters of the Gulf of Mexico, oil rigs attract fish.在墨西哥湾的浅海水域，石油钻塔吸引了大量的鱼群。Fish shoaled beneath the weirs.鱼群聚集在拦鱼栅下。 |