集总常数 ) 是FDG ( 氟代脱氧葡萄糖)与葡萄糖的代谢率之比.Lumped constant ( LC ) is the ratio of FDG metabolism ratio to glucose metabolism ratio.研究表明Yb ( OSO2C8F17 ) 3和C10F18分别是最好的氟代催化剂和氟溶剂.The results showed that Yb ( OSO 2 C 8 F 17 ) 3 and C ...
Human perception is highly imperfect and by definition subjective.人的感知具有高度缺陷,而且天性主观。an imperfect understanding of English对英语的不透彻理解Soot is the product of the imperfect combustion of fuel.煤烟是燃料不完全燃烧的产物....
Lead was one of the metals known to the ancient world.铅是早在古代就已知的金属之一。Metals expand when they are heated.金属受热会膨胀。What spurred them on was alchemy, the'science " of changing ordinary metals into gold.激励他们的是炼金术, 即把普通金属...