微克（WēiKè），质量单位，符号 μg（英语：microgram）。1μg 等于一百万分之一克。等于10的-6次方克。
n. microgramme ; gamma ; microgram
abbr. mcg
Experiment results also showed that papaverine has been absorbed and distributed by 30～60 mg after intramuscular injection or intravenous injection,the concentration of drug acted on the remote end was very tiny, by calculating only several microgram could reach fingers.
而且有研究表明罂粟碱30～60 mg肌注或静脉注射后经过吸收和分布,作用于远端的药物浓度甚微,经计算到达手指仅有几微克。
参考来源 - 罂粟碱不同给药途径对兔腹壁浅动脉皮瓣血管阻力影响的研究·2,447,543篇论文数据，部分数据来源于NoteExpress
测试结果应当不高于20微克/升。
Results should not be above 20 micrograms per liter of urine (20ug/L).
要想获得针脚上那几微克的金我们需要一个电解池。
To recover the few micrograms of gold deposited on the pins, we're going to use an electrolytic cell.
准则指出，为了防止健康不良，这些水平应低于每立方米20微克。
The guidelines say that, to prevent ill health, those levels should be lower than 20 micrograms per cubic metre.
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