is that competition drives adaptation. 竞争推动适应
and frequent donor to NPR pledge drives. 中♥央♥台慈善计划的长♥期♥志愿者
Biting flies and the quest for new pasture drives the migration ever onwards. 会叮咬它们的苍蝇以及为了寻找新草场, 驱使它们不停的向前迁徙
The lead dog drives the impala towards the hidden flankers. 头犬将黑斑羚赶向侧翼的埋伏区
The water drives out insects from the parched ground, 水将燥热土壤中的昆虫驱赶出来