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500ppm

500ppm

500ppm

500ppm

1

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 。

2

Last week Lord Stern suggested that meeting a less stringent target (500 parts per million) would cost 2% of world gross domestic product .

上周，斯特恩爵士表示，只符合宽松些的目标（500ppm ）将消耗世界国内生产总值的 2%（9 ）。

3

The specification for lead impurity content in lead-free solder content is under 500ppm.

规范中规定无铅焊锡膏内容物中铅杂质的内容物含量不得超过 500ppm 。

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