| 释义 |
〔point〕A jeweler's unit of weight equal to 2 milligrams or 0.01 carat.点:宝石商所用的重量单位,等于2微克或0.01克拉〔microgram〕A unit of mass equal to one thousandth (10-3) of a milligram or one millionth (10 -6) of a gram. 微克:质量单位,等于千分之一毫克或百万分之一克〔picogram〕One trillionth (10-12) of a gram. 皮可克,微克:万亿分之一克(10-12) |