The yields of other cyclic acetals were between 62.并在此条件下合成了多种环缩醛,收率62.Eight acetals ( Ketals ) were synthesized under the optimal conditions.在最佳条件下,合成了八个缩醛 ( 酮 ) 化合物.The hydroxyl groups can be changed into esters , ethe...
He was waving his arms to draw their attention.他正挥手以引起他们的注意。The small British crowd roared themselves hoarse, waving their Union Jacks.一小群英国人挥舞着国旗，吼得嗓子都沙哑了。The windows overlooked a lawn of tall waving grass.窗户外边是一块草地，高高的...
制造芳香族硝基化合物的硝化器为铁制的容器.The nitrators used in the manufacturing of aromatic nitrocompounds consist of iron vessels.他归来时看到骑士正缓慢而节制地喝着铁制的长勺中的水.Michael went to find a bucket and some straw for the horse.这个塑料部件比铁制的还好.This plast...
The arrogance became his protective carapace.这种傲慢态度成了他的保护壳。He tickled gently at its glossy carapace,but the stubborn beetle would not budge.他轻轻地搔着甲虫光滑的壳，但这只固执的甲虫就是不动。small freshwater crustaceans with a shield-shaped cara...