Glyoxylic acid was rapidly synthesized by catalytic oxidation of glyoxal with H 2 O 2.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.Glyoxal is prepared with waste liquid propellant HNO 3 - 27 S and ethanal.利用报废的液体推进剂硝酸-27S和乙醛制备乙二醛.There a...
You must work hard to emulate your sister.你必须努力工作,赶上你姐姐.Teenagers are very sequacious and they often emulate the behavior of their idols.青少年非常盲从,经常模仿他们的偶像的行为。You must work hard to emulate your brogher's success.你必须努...
查理连生话必需品都无钱购买, 更不必说烟酒等奢侈品了.Charlie cannot find money for necessities, let alone such luxuries as wine and tobacco.其宏观缺陷主要为连生、孪生 、 包裹体, 宏观生长台阶和条纹、开裂等.The macroscopic defects of KBBF are mainly twin crystal, inclusions, ma...
当我回想起来,往事全都涌上了心头。When I thought about it, it all came back.我不再去回忆那些痛苦不堪的往事了。I shut out the memory which was too painful to dwell on.你回忆往事的方式真好笑。It's funny how you remember things....