您要查找的是不是：
- On this basis, the Secretary of Labor had set the permissible exposure level for workers at 1 ppm (part per million), which he considered the lowest feasible level. 根据这一点，劳动部长已把工人的允许接触水平规定为百万外之一，他认为这是最低的可行性水平。
- Data are presented as concentrations in part per million (ppm) or qualitatively as positive or negative, depending on results reported. 数据作为部分的浓度为每百万（百万分之一）或定性为积极或消极的，取决于报告的结果。
- A ratio change by as little as0.1 part per million could signal an influx of carbon dioxide from magma either building under or rising up through the volcano. 比例的变化即使只有千万分之一，都可能是种警讯，表示有岩浆在火山内累积或逐渐上升，其中的二氧化碳逸出所致。
- Data are presented as concentrations in part per million (ppm), part per billion (ppb) or qualitatively as positive or negative, depending on results reported. 数据作为部分的浓度为每百万（百万分之一），每10亿部分（浓度）或定性为积极或消极的，取决于报告的结果。
- Only three parts per million can kill sea urchin embryos, for example. 废水处理不能完全清除其最常用的成分三氯生，而它对海洋生物有毒。
- Alloy steel heats are vacuum-treated on degassing units to reduce hydrogen contact to less than two parts per million and reduce metallic oxides. 合金钢热是在脱气装置下进行真空处理，以将氢接触减少到百万分之二以下，并减少金属氧化物。
- 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。
- What are your lead numbers typically on this product? Do you offer a product with lead under 250 parts per million? 你们的典型产品的导数是什么?你们提供每百万250个配件用这个导数的产品吗?
- Defect levels most often are measured as defects per million opportunities (DPMO), also called parts per million (PPM). 最常用来评估缺陷等级的物理量是百万机会缺陷数（DPMO），也称百万分率（PPM）。
- At one point during a six-day sunless period, CO2 reached a high of 3,800 parts per million (ppm). 有一次连续六天阴天，二氧化碳的含量高达3,800/百万PPM。
- For swimming pools using ozone for disinfection, ensure that the water should contain not less than 0.5 Parts per million of chlorine. 如泳池使用臭氧消毒;应确保池水的氯含量不少于百万分之0.;5。
- Furthermore, Stern estimates that to achieve stabilisation at 550 parts per million without CCS will increase costs by more than 60 per cent. 而且，斯特恩预计：不使用CCS，要保持空气比例稳定在550等份/百万，那么将增加60%25的成本。
- These are 30 parts per million (ppm) for infant garments, 75ppm for garments which contact the skin and 300ppm million for other garments or fabrics. 这些是婴儿的每百万(百万分之一)30个部份衣服,衣服的75个百万分之一连络那皮肤和300个百万分之一百万为其他的衣服或织物。
- The brightness of its light ball only parts per million, and only in the total solar eclipse or with a special instrument to see the corona. 它的亮度仅为光球的百万分之一，只有在日全食时或用特制的日冕仪才能看见。
- Levels of the gas at the Zeppelin research station on Svalbard, northern Norway, last week peaked at over 397 parts per million (ppm), an increase of more than 2.5ppm on 2008. 挪威北部斯瓦尔巴群岛上的齐柏林研究站上周记录的二氧化碳气体水平最高值超过397个百万分点，比2008年的水平增加了2.;5个百万分点。
- Calculate or convert: relative humidity, dewpoint / frostpoint, absolute humidity, water content, mixing ratio, vapor pressure, parts per million, wet bulb temperature. 计算或转换：相对湿度，露点/ frostpoint ，绝对湿度，水含量，配比，蒸气压，百万分之一，湿球温度。
- The TLV-TWA for CO2, as listed by American Conference of Governmental Industrial Hygienists and by the Occupational Safety and Health Administration, is 5000 parts per million, or 0.5%.The CAS # for CO2 is 124-38-9. 正如美国政府工业卫生学者会议和职业安全和健康管理局所列出的，对于二氧化碳的TLV-TWA值是百万分之5000或0.;5%25。对于二氧化碳，cas %23是124-38-9。
- The TLV-TWA for CO 2 , as listed by American Conference of Governmental Industrial Hygienists and by the Occupational Safety and Health Administration, is 5000 parts per million, or 0.5%. 正如美国政府工业卫生学者会议和职业安全和健康管理局所列出的，对于二氧化碳的TLV-TWA值是百万分之5000或0.;5%25。
- The observed amount of X-rays from Chandra and the non-detection of gamma rays from the Compton data show that the antimatter fraction in the Bullet Cluster is less than three parts per million. 不过，钱德拉望远镜观测到的X射线量和康普顿望远镜没有探测到伽马射线的数据说明，反物质在子弹星团中的比例不到百万分之三。
- fluoride levels of 0.2 parts per million 百万分之零点二的氟化物含量
