对于尼古丁，仅仅是1.8毫微克每毫升，太低而不易提取。
For nicotine, that level was a mere 1.8 nanograms per milliliter — too low to be picked up in tests.
当研究对象睡眠少于6小时，他们的饥饿激素水平从每升75毫微克上升到85毫微克。
And when the study subjects were getting less than six hours of sleep a night, their ghrelin levels rose from 75 nanograms per liter to 84 ng per liter.
在医学研究院坚持20毫微克就足够了，但是其他专家则建议标准应该高一点以确保钙质吸收最大值和骨骼健康。
The Institute of Medicine maintains that a level of 20 nanograms is adequate, but other experts say it should be higher to assure maximum calcium absorption and bone health.
中国要求垃圾焚烧炉所排放的二恶英每立方米不超过一毫微克，欧盟的标准则是这一标准的十分之一。
China requires that incinerators discharge no more than one nanogram of dioxin per cubic metre. The European Union sets a standard that is one-tenth of that amount.
今年7月，在佐治亚州亚特兰大市举行的“2007机器人足球世界杯”毫微克演示比赛中，一支由机器人组成的新球队首次亮相。
As part of the 2007 RoboCup in Atlanta, Georgia, a new fleet of bots debuted in the Nanogram Demonstration competition in July.
今年7月，在佐治亚州亚特兰大市举行的“2007机器人足球世界杯”毫微克演示比赛中，一支由机器人组成的新球队首次亮相。
As part of the 2007 RoboCup in Atlanta, Georgia, a new fleet of bots debuted in the Nanogram Demonstration competition in July.
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