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Lambda 750紫外/可见/近红外分光光度计是珀金埃尔默公司集多年光学仪器制造的先进经验，采用最新的材料与工艺，为二十一 ...

Carbon dioxide is a colorless, odorless gas that is retained in the blood when sleep disorders occur. Its chemical compound consists of one atom of carbon covalently bonded to two atoms of oxygen.

The primary and unequivocal driver of climate change since the 1850−1900 period is the accumulation of greenhouse gases in the atmosphere. Global mean surface warming throughout the 21st century will ...