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。

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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。

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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。

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The team found levels of lead as high as thirty-two thousand parts per million in tests on some paint samples from Ecuador.

VOA: special.2009.08.31

Eleven dollars per part at 12.5 million cars and trucks came to a total cost of $137 million to improve the safety.

给1250万辆轿车和卡车配上11美元的隔板,提高安全性，共需花费一亿三千七百万美元。

耶鲁公开课 - 公正课程节选

The endowment at Yale is something like two million dollars per student now that's just sitting there as money that could be spent.

耶鲁基金总额目前折合下来是,每个学生两百万美元,这笔钱就放在那里,随时可以折现花掉

耶鲁公开课 - 金融市场课程节选

Floating sensors hold the oxygen to between 2 and 2.5 parts per million of water.

FORBES: Muckraker

Floating sensors hold the oxygen to between 2.0 and 2.5 parts per million of water.

FORBES: Muckraker

For comparison, the last time annual CO2 was 350 parts per million was in the 1980s.

CNN: CO2 levels hit new peak at key observatory