When the researchers raised snails in the water, they bred with extreme rapidity - a warning sign that the chemicals were active.

研究人员在水中养蜗牛时发现蜗牛的繁殖速度极快——这是一个警告信号：该化学物质很活跃。

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If it is promising, it is selectively bred with other fit offspring to see if the results, when subject to further mutation, can do even better.

如果这个后代大有希望，那它则会被选择与其它合适的后代进行繁殖来看结果(这是会进行进一步的变化)是否会更好。

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Same went for the female flies bred with the male version of the gene - they acted more like male flies, often even attempting to mate with other females.

相同的如果雌性果蝇和好战的雄性结合后，她们的行为会更像雄性，并经常试图去和别的雌性作战。

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Most efforts, including the recent news of a disease-detecting rhesus monkey (bred with a glowing jellyfish gene), focus on improving the characteristics of existing organisms.

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But London's bombing suspects are British, born and bred, with jobs and families and lives.

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Eisenhower was basically a Dewey Republican but being a Texas-born, Kansas-bred Westerner with a religious orientation and someone who could speak to Western values (and was pretty obviously comfortable in boots), he could appeal to the Taft wing.

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