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....
Credo: I will return with help! You stall him until then!我会回来协助的! 你先在这里拖住他.To be the first to bear hardship and the last to enjoy comfort is our credo.吃苦在前，享受在后，这就是我们的口号。Lord Clarendon's liberal credo was one of the...
The program saved $11 million in 1988 by substituting generics for brand-name drugs.该计划用非专利药取代品牌药，在1988年节省了1,100万美元。Payers are being more pushy about getting patients to take generics.药物费用的支付者更倾向于让病人使用非专利药.This essay int...
今天早晨，刘易斯面色憔悴、疲惫不堪地递交了辞呈。This morning, looking harassed and drawn, Lewis tendered his resignation.尼克环视着盯着自己的那一张张憔悴的面孔。Nick glanced around at the haggard faces watching him.她转向我时看上去憔悴又疲惫。She looked drawn and tired when she...