查询词典 parts per million

Based on the ratio of the minerals, the team reports in tomorrow's issue of Nature that CO2 levels during the Archean could have been no higher than about 1000 parts per million—about three times the current level of 387 ppm and not high enough to compensate for the weak sun.

根据两种矿物的比例，研究小组在明天出版的《自然》杂志上报道说：在太古代期间，二氧化碳的水平决不会高于大约百万分之一千（1000ppm）——大约三倍于目前的水平（387ppm），不足以弥补阳光的弱势。

Based on the ratio of the minerals the team reports in tomorrow's issue of Nature that CO2 levels during the Archean could have been no higher than about 1000 parts per million—about three times the current level of 387 ppm and not high enough to compensate for the weak sun.

根据两种矿物的比例，研究小组在明天出版的《自然》杂志上报道说：在太古代期间，二氧化碳的水平决不会高于大约奥︱分之一千（1000ppm ）——大约三倍于目前的水平（387ppm ），不足以弥补阳光的弱势。

COTT CLARK: Most of the paint brands that we looked at had at least one sample that was above ten thousand parts per million, which is over a hundred times the current U.S.

cott Clark ："我们所调查的油漆中，大部分品牌至少有一个样本的含铅量超过10000个ppm，是美国现行标准的100多倍。"

The trace gas concentration was measured by the above method, for example,1～70 parts per million by volume of hydrogen, or acetylene or ethene, or 50～550 parts per million of carbon monoxide.

计算结果表明，单一网络的泛化能力较强，但识别准确度在某些值处达不到实用的要求。

This parameter is specified with a maximum and minimum frequency deviation, expressed in percent or parts per million.

此参数指定一个最高和最低频率偏差，以百分比表示或百万分之的。

The 1H-NMR spectrum collected on a 200 MHz instrument had a doublet at a chemical shift of 5.88 parts per million which integrated to one proton, a multiplet at 4.19 ppm which integrated to one proton, a singlet at 2.5 ppm which integrated to six protons, a doublet at 1.60 ppm which integrated to three protons, and a broad peak at 0.8 ppm which integrated to two protons.

该核磁共振谱收集在一个200 MHz的仪器有一个双线在化学位移5.88百万分之的综合，以一质子， 1 multiplet在4.19 ppm的综合，以一质子，单在2.5 ppm的综合到6个质子， 1双在1.60 ppm的综合三个质子，和广阔的高峰期， 0.8 ppm的综合两个质子。

The 1H-NMR spectrum collected on a 200 MHz instrument had a multiplet at a chemical shift of 5.3 parts per million which integrated to one proton, a triplet at 2.5 ppm which integrated to four protons, two doublets at 1.66 ppm and 1.59 ppm which integrated to three protons each, and a multiplet from 1.4-1.2 ppm which integrated to six protons.

该核磁共振谱收集在一个200 MHz的仪器有一个multiplet在化学位移5.3每100万的综合，以一质子，三重在2.5 ppm的综合，以4个质子， 2 doublets在1.66 ppm和1.59 ppm的综合，以3个质子，每个和multiplet从1月4日至1月2日ppm的综合，以6个质子。

During the autopsy the toxicologist Raymond Abernathy found her blood concentration of pentobarbital {Nembutal} to be 4.5 mg percent. This converts to 45 ppm {parts per million}.

尸检时，毒物学专家雷蒙特·阿博纳赛发现梦露体内血液中"戊巴比妥"的含量4.5mg％，相当于45 ppm。

The table data measures the number of detected oil droplets per frame and converts to parts per million.

该表的数据检测了每个集中监测到的油滴的说量，然后换算成 PPM 。

Dr Weiss and his colleagues excel at the precise measurement of gases present in vanishingly small amounts—things measured in parts per trillion, rather than the parts per million used for carbon dioxide.

韦斯博士和他的同事在微量气体精确测量方面十分杰出。他们的测量单位是以亿万分之几计算而不是用于测量二氧化碳的百万分之几。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。