Copper - containing catalysts are the most suitable catalysts for producing 1, 2 - propanediol through catalytic hydrogenolysis of glycerol.对甘油催化氢解制取1, 2- 丙二醇效果最好的是含铜的催化剂....
The treasure had lain undisturbed for centuries.那份珍宝安然无恙地存放了几个世纪。Upon whose Bosom snow has lain ; Who intimately lives with rain.皑雪曾落在她怀抱里,她和雨相处亲密." Grain lain " day - bringing gentle drizzles - was not far off.“ 谷雨 ” 节一...
Our superior technology is our ace in the hole.我们超众的技术是我们的法宝。That is the third ace that he has served this match.那是他在这场比赛中的第3次发球得分.The child came within an ace of being drowned.孩子差一点儿淹死了....
他选择的主题被认为是浅薄的。His choice of subject matter has been regarded as lowbrow.这些人在压力下会显得浅薄无知、操之过急，而且爱摆布人。Under stress these people will appear to be superficial, over-eager and manipulative.骄傲来自浅薄, 狂妄出于无知.Conceit comes from sh...