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1·Earlier this year carbon dioxide levels reached 400 parts per million.

今年早些时候，二氧化碳水平达到每百万400单位。

2·Want concentration of CO2 in atmosphere lowered from 380 to 350 parts per million.

希望将大气中二氧化碳含量由百万分之380降低到百万分之350。

3·A normal amount of CO in your blood is extremely low — zero to eight parts per million.

血液中CO普通含量相当低——零至百万分之八。

4·The level of carbon dioxide in the atmosphere is measured in parts per million (PPM).

大气层里二氧化碳含量的测量单位是ppm，即一百万体积的空气中所含二氧化碳的体积数。

5·To put that in perspective, the current level of CO2 in the atmosphere is 387 parts per million.

总的看来，现在的大气中二氧化碳含量为万分之三点八七。

6·These levels are comparable to the 500 to 1000 parts per million of water in the Earth's upper mantle.

这一水分含量堪比地球的上层地幔500到1000ppm的水含量。

7·Global carbon levels are currently at 380 parts per million compared to 280 before the Industrial Revolution.

全球的二氧化碳排放量已达到百万分之380超过了工业时代的百万分之280。

8·If the Earth reaches 800-1000 parts per million, as the worst-case scenarios predict, it’s really anybody’s guess.

如果二氧化碳的排放量达到百万分之800-1000， 正如人们猜测的，那将是最坏的情况。

9·Hitherto diesel contained up to 500 parts per million (ppm) of sulphur, but the new rules limit sulphur to 15 ppm.

目前，柴油中硫含量为500ppm，但新规定将其限制在15ppm。

10·23 out of 28 products – 82 percent – contained formaldehyde at levels ranging from 54 to 610 parts per million (ppm).

28件产品中的23件 - 82% - 甲醛含量在54至610百万分率(ppm)之间。