例如，在倒数第二个冰期的高峰和接下来的间冰期之间，甲烷浓度几乎增加了一倍。

The methane concentration nearly doubled, for example, between the peak of the penultimate glacial period and the following interglacial period.

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研究人员将一批鱼苗饲养在正常海水中，将另一批鱼苗饲养在二氧化碳浓度高出普通值一倍-预计在2100年太平洋中的二氧化碳浓度-的海水中。

Researchers raised one set of reef fish larvae in normal seawater and one set in water containing twice as much CO2—the level that the Pacific Ocean is expected to reach by 2100.

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不过，WASP - 12b的碳浓度要比通常情况高出一倍多，而且甲烷的浓度几乎是预计的100倍。

As for WASP-12b, however, there was more than twice the concentration of carbon as usual and almost 100 times more methane than expected.

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Now, if I was a person that was designing a vaccine and I noticed that this was the response that it got, that antibodies were produced, they reached some intermediate level, they started to fall, I would say, "Well I haven't stimulated the immune system enough, let me re-boost, let me give another dose of antigen."

现在,如果我正在研究一种疫苗,我注意到机体会对这种疫苗产生应答,也就是会产生抗体,当抗体浓度达到中等水平后,就开始下降,就可以说,疫苗对免疫系统刺激还不足,我需要提高抗原浓度,让我再把剂量再加大一倍

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