百万分之；兆比率

百万分之几

parts per millions───一百万分之一；百分率

paper mill───n.造纸厂

paper mills───造纸厂

the million───百万

base bullion───贱金属

gone a million───消失了一百万

parturition───n.分娩，生产

party affiliation───党派关系

pepper mill───胡椒磨，胡椒碾磨器

The term parts per million ( ppm ) was widely used but frequently led to misinterpretation.───广泛使用百分之几 ( ppm ) 表示结果,但常常引起误解.

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。

The team found levels of parts per million in tests on some paint samples from Ecuador.───这个团队发现了来自厄瓜多尔的油漆样本高达32000ppm的锌的含量.

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。

Until this past month, the safety standard for consumer paints was 600 parts per million.───直到上个月, 消费者油漆安全用量是每百万油漆含有600的铅.

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。

Chinese health officials have said no harm comes from consuming less than 0.63 parts per million.───中国卫生官员称,食用的三聚氰胺不超过百万分之0.63的话不会对人体构成伤害.

The maximum exposure level permitted by the Occupational Health and Safety Administration is 0. 75 parts per million.

Nitrate levels must remain below 50 parts per million to stay within the law.

Typically, the giant planets contain about forty-five parts per million of helium-3 in their atmospheres.

One group ate food with 0.3 parts per million (ppm) methylmercury, which most U.

The standard requires detectors to sound before carbon monoxide levels exceed 100 parts per million for 90 minutes.

The discovery prompted the safety commission to recommend a lead standard of 200 parts per million for mini-blinds.

When Delaney offered his amendment, scientists could identify traces of potentially harmful substances down to a level of parts per million.

Experiments she conducted in Hawaii show reefs will dissolve 48 percent faster when the level of CO2 in the atmosphere jumps from 400 parts per million to 750 ppm.

The term parts per million ( ppm ) was widely used but frequently led to misinterpretation.