ppm

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ppm是什么意思
英式音标:['pi:p'i:'em]
美式音标:['pip'i'em]
词汇分类:BSNJ-PAMC-II,经济学人词频200以下(低频词 约12000个),The Economist(经济学人)20年词频表(全),经济学人2001-2016年词频表,石油工程专业英语(乱序)English for Petroleum Engineering,经济学人词频词汇-5(50-99次)
概况:

abbr. 百万分率,百万分之…(parts per milpon)

词义:

abbr.

part per million 百万分之…;

英英释义

PPM

PPM is an initialism that can refer to any of the following in this list:

以上来源于:Wikipedia

用法:

权威例句

70 000 PPM-sparare flyttas till statliga Såfan

Implementing the PPM data compression scheme

Unbounded length contexts for PPM

Pensionsmyndigheten slänger ut PPM-jätten

A 2-V 23-μA 5.3-ppm/°C curvature-compensated CMOS bandgap voltage reference

The inflammatory effects of 2 ppm NO2 on the airways of healthy subjects.

A 2-V 23-/spl mu/A 5.3-ppm//spl deg/C curvature-compensated CMOS bandgap voltage reference

Performance evaluation of TH-PPM UWB systems in the presence of multiuser interference

Role of accurate mass measurement (+/- 10 ppm) in protein identification strategies employing MS or MS/MS and database searching.

Parametric drive of a toroidal MEMS rate integrating gyroscope demonstrating < 20 PPM scale factor stability
英语词源:

ppm

abbreviation of parts per million, attested by 1913.

造句:

1. These decrements in intellectual behavior were found in firemen exposed to carbon monoxide at 100 ppm for varying periods of time.

在不定期地暴露于100ppm浓度的一氧化碳的瓦斯检验员中,发现了这种智力行为的衰退。

-- 来源 -- 英汉 - 辞典例句

2. 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。

-- 来源 -- 英汉 - 辞典例句

3. An Inhalation Lclo (Mouse) of 9600 ppm for four hours has been determined.

四小时吸入Lclo (鼠) 为9600 ppm已经被确定。

-- 来源 -- 英汉 - 翻译样例 - 产品

4. It has a repulsive acidic odor that can usually be detected at or below a concentration of 5 ppm.

它有一种另人厌恶的酸味,在浓度为5 ppm或以下可以察觉到。

-- 来源 -- 英汉 - 翻译样例 - 产品

5. This is based upon actual measurements which indicate that exposure of up to 30,000 ppm x min did not cause any negative health effects in laboratory animals, while anemia did occur at exposures of 120,000 ppm x min.

这是基于实际测量的。该测量显示,大到30,000 ppm x min的暴露不会在实验室动物身上导致对健康的负面影响,而当暴露达到120,000 ppm x min时确实发生了贫血。

-- 来源 -- 英汉 - 翻译样例 - 产品

6. Concentrations of 10 ppm can be endured for only a few minutes and cause profuse lacrimation in all people.

10ppm的浓度,只需几分钟,就会使所有的人流泪不止。

-- 来源 -- 英汉 - 辞典例句

7. Carbon dioxide is a minor but important constituent of the atmosphere, averaging about 0.03% or 300 ppm by volume.

二氧化碳是空气的含量较小但很重要的组成成分,体积比平均约为0.03%或300 ppm。

-- 来源 -- 英汉 - 翻译样例 - 产品

8. The National Academy of Sciences-National Research Council, Committee of Toxicology, has recommended an Emergency Exposure Limit (EEL) for NF3 of 22,500 ppm.

国家科学院—国家研究理事会毒物学委员会已经推荐的NF3紧急暴露极限(EEL)为22,500 ppm。

-- 来源 -- 英汉 - 翻译样例 - 产品

9. Any combination of time of exposure and concentration that is less than the recommended level of 22,500 ppm x min is acceptable. Table 2 illustrates acceptable exposure times for varying concentrations of NF3 in air at the EEL of 22,500 ppm x min.

任何小于22,500 ppm x min的推荐水平的暴露时间和浓度的组合都是可以接受的。表2说明了在22,500 ppm x min的EEL下,对于空气中不同的NF3浓度可以接受的暴露时间。

-- 来源 -- 英汉 - 翻译样例 - 产品

10. Daily inhalation of 45 to 100 ppm for several hours has been associated with symptoms of irrifability, anorexia, headache, giddness, and emotional instability.

每天吸收45至100ppm几小时,会引起各种症状,如刺激性食欲不振,头疼,眩晕和情绪不稳定等。

-- 来源 -- 英汉 - 辞典例句

ppm

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