Less than half of countries use the recommended blood alcohol concentration limit of 0.05 grams per decilitre as a measure to reduce drink-driving.

不到一半的国家使用所推荐的每分升0.05克血液酒精浓度限制措施，以减少酒后驾车。

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Base on the concept of image point diameter, formula was obtained to estimate concentration limit when particle-imaging technique was used for measuring particulate flow.

基于像点直径的概念，推导了颗粒成像法测量颗粒场时的最大极限浓度估算公式。

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For the dust concentration limit of inlet gas in other industries, we should select in reference to concentration limit specified in the other type of bag dust collectors.

对于其它行业中进口气体的含尘浓度则应参照其它类型布袋除尘器所规定的浓度限值选用。

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These are huge investments, even if their concentration in one rich corner of the Arab world will limit their impact.

ECONOMIST: A silent social revolution

Some providers of single-country ETFs address concentration risk by using a "modified market weighting" to limit their exposure to a country's giant stocks, or simply by focusing on stocks of smaller companies.

WSJ: Single-Country ETFs: Risky Ventures