She shrugged a stray lock of hair out of her eyes.她把一缕散发从眼前甩开。"Do you mind if I wait?" I asked. Melanie shrugged: "Please yourself."我问道:“要不我等会儿吧?”梅拉妮耸耸肩说:“随你便。”When I finally posed the question, "Why?" he merely shrugged...
Amphetamines is one kind of synthetic compounds whose precursor structure is amphetamine.苯丙胺类物质是一大类人工合成的以苯丙胺为母体的化合物.Methedrine and amphetamine can and will freeze your mind and kill your body.没太得灵和安非他命能够让你失心丧命.a form of ...
A new method for determining anthraquinone of Cassia obtusifolia L.提出了三氯化钛-分光光度法测定决明子中总蒽醌含量的新方法.Conclusion: The preparation process to extract and purity total anthraquinone was feasible.结论: 该实验所确定的提取及纯化工艺对大黄总蒽醌的富集是切实可行的...
在催化剂存在下,用双氧水氧化乙二醛溶液快速合成了乙醛酸.Glyoxylic acid was rapidly synthesized by catalytic oxidation of glyoxal with H 2 O 2.利用报废的液体推进剂硝酸-27S和乙醛制备乙二醛.Glyoxal is prepared with waste liquid propellant HNO 3 - 27 S and ethanal.乙二醛 、 乙...