参赛运动员中有三位世界纪录的保持者。
即使新的种群属于不同物种，它也可以大致填补已灭绝种群空出的生态位，保持食物网的完整。
Even if the new population is of a different species, it can approximately fill the niche vacated by the extinct population and keep the food web intact.
我认识的一位房地产经纪人通过想象重新装修给客户看的房子，来让自己保持在工作中的愉快状态。
A real estate broker I know keeps herself amused on the job by mentally redecorating the houses she shows to clients.
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