1.The city's average concentration of PM2.5 was 28 micrograms per cubic meter during the period.

在此期间，北京PM2.5浓度为每立方米28微克。

2.Phloem from the tree at the eruption site had 9.5 micrograms of the metal per kilogram.

位于喷发点树上韧皮部中每千克含有9.5毫克汞。

3.The concentrations of 70 micrograms per liter.

浓度为每升70微克。

4.Those cities both measured at over 92 micrograms.

这两个城市PM2.5浓度都超过了92微克/立方米。

5.For comparison, the annual U.S. budget would be enough to create only a few micrograms of antimatter.

相比之下，美国每年预算足以制造出几微克反物质。

6.The average concentration of PM2.5 hazardous particles was 30 micrograms per cubic meter, down 9.1 percent year-on-year.

颗粒物（PM2.5）浓度为 30 微克/立方米，同比下降 9.1%。

7.One microgram is the lethal dose for a human being.

只需百万分之一公克钸，就足以致命。

8.The Chinese city of Hotan was second, with 94.3 micrograms.

中国和田市位居第二，PM2.5浓度为94.3微克/立方米。

9.The WHO recommends a reading of no more than five micrograms.

世界卫生组织建议读数不超过5微克。

10.Even a small amount (less than a microgram) is enough to kill a healthy adult.

仅仅很小量（小于一微克）就足以杀死一个年人。

11.In India, New Delhi's measurement of 92.7 micrograms made it the most-polluted capital city.

在印度，新德里PM2.5浓度是92.7微克/立方米，这使其为污染最严重首都城市。

12.That compared with a 3 percent increased risk for every 3 microgram increase in non-wildfire particles.

相比之下，以非野火烟雾释放方式，颗粒物每增加3微克，被诊断患有痴呆症风险就会增加3%。

13.124 micrograms is all it takes to kill you, about the same weight as two human eyelashes.

仅 124 微克就可以致人死亡，也就相当于人类两根睫毛重量。

14.This week, a high of more than 1,000 micrograms was recorded in one part of South Korea.

本周韩国一个地区创下了超过1000微克记录。

15.The average concentration of PM2.5 in Beijing is 33 micrograms per cubic meter in the first 11 months of this year.

今年前 11 个月，北京 PM2.5 浓度为每立方米 33 微克。

16.If they tested your urine and you had a higher concentration than 12 micrograms per millilitre, you were out.

如果他们检测你尿液浓度超过12μg/mL，你就出局了。

17.The city's average concentration of PM2.5 stood at 33 micrograms per cubic meter in the January to May period.

在 1 月至 5 月期间，北京 PM2.5 浓度为每立方米 33 微克。

18.Started 270 micrograms per minute ten minutes ago, still no change.

Chase：十分钟前开始每分钟270微克，仍然没有变化。机翻

19.The E.P.A. has set the safety threshold for PM 2.5 at a yearly average of 12 micrograms per cubic meter.

环保署给pm2.5设置浓度限值为年浓度12μg/m3。

20.World Health Organization (WHO) guidelines recommend concentrations stay below an average of 15 micrograms per cubic metre over 24 hours.

世界卫生组织（WHO）指导方针建议在 24 小时内将浓度保持在每立方米 15 微克以下。