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.
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.
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.
根据《癌症研究杂志》，IGFBP - 1浓度低的男性和女性患胰腺癌的几率比浓度高的人群高一倍。
The men and women with the lowest levels of IGFBP-1 were twice as likely as those with higher levels to develop pancreatic cancer, according to the report in the journal cancer Research.
结果表明，用SSNTD测得的装修后居室内的氡浓度比以往用瞬时法测得的、未经装修的增加一倍。
The results indicate that the measured radon concentrations indoors in this way is as high as two times those measured by instantaneous method in undecorated houses.
结果表明，用SSNTD测得的装修后居室内的氡浓度比以往用瞬时法测得的、未经装修的增加一倍。
The results indicate that the measured radon concentrations indoors in this way is as high as two times those measured by instantaneous method in undecorated houses.
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