Given that there is a living to be made at night, and given that alternative daytime trades are thoroughly occupied, natural selection has favoured bats that make a go of the night-hunting trade.

考虑到夜晚也可以生存，并且可供选择的白天的“交易”完全被占用，它们自然选择偏爱那些成功在夜间进行捕食“交易”的蝙蝠。

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While some Socialists did view price protests as a direct step toward socialism, most Socialists ultimately sought to divert the cost-of-living movement into alternative channels of protest.

虽然一些社会主义者确实将抗议价格视为向社会主义迈出的直接一步，但大多数社会主义者最终寻求将生活成本运动转移到抗议的其他渠道。

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But now researchers at the University of Washington have discovered nature's alternative to the power outlet: living trees.

但是现在华盛顿大学的研究人员发现了电源插座的自然界替代物：活树。

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While he acknowledges that there is much to be learned from alternative research methods like cell culture a process by which cells are taken from a living organism and grown under controlled conditions VandeBerg says they have learned a lot more from research on chimpanzees.

VOA: standard.2010.02.16

Sometimes, after all, it may be better that people live apart, if the alternative is living together at each other's throats.

ECONOMIST: Don��t let the endgame be his

The 33-bed adult home is at the center of Fellowship Community, a collection of about 130 men, women and children founded in 1966 that offers seniors including the aging baby boom generation an alternative to living out their final years in traditional assisted-living homes or with their grown sons and daughters.

WSJ: For the aging, a commune-like alternative in NY

He is also calling on the Bank to expand its work on rainforest protection by piloting new ways to provide alternative incomes for people living in rainforests, rather than cutting them down.

BBC: NEWS | Business | World Bank 'must act on climate'