Note：PPM means part per million, usually a measure of quality.

注：PPM是百万分之一件的缩写，通常是质量的一种指标。

youdao

It's reasonably priced at $2 per million pages crawled and 3 cents per CPU hour.

而它的价格很合理，每爬行100万个页面只要2美元，每片CPU每小时只收3分钱。

youdao

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。

youdao

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