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 waiter returned with their order and Graham signed the bill.侍者把他们点的餐端了过来，格雷厄姆签了单。Someone comes in every day to check all is in order.每天都有人来检查是否一切都井然有序。A point of order was raised in parliament by Mr Ben Morris.本·莫里斯先...
For most practical cases ergodicity cannot be experimently determined.对最实际的一些情况,各态经历性不可能由实验来决定.They wanted to design a machine that was both attractive and practical.他们想设计一种既美观又实用的机械。How could she be so practical when he...