This sounds like a barrage of accusation—I don'tintend it to be.这听起来像是接二连三的指责——这并非我的本意。A barrage would halt the flow upstream and lift the water level.一道拦河坝将会在上游拦住水流，抬升水位。The attack jumped off under cover of a barra...
It was imperative that he act as naturally as possible.最重要的是他要做到尽可能自然。With football, it was just something that came naturally to me.说起踢足球，对我来说再容易不过。When things go wrong, all of us naturally feel disappointed and frustra...
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....