平整的织物需要使用不卷缩的纱线, 而对于绉织物和要求产生某些花式效应时, 使用卷缩纱线是较合适的.Smooth fabrics require balanced yarns, but for crepe and textured effects, unbalanced yarns are desirable....
在醇溶剂中,它不能被硼氢化物还原.It is resistant to borohydride reduction in alcoholic solvents.然后氢化物在低温火焰中分解.The hydrides are then decomposed in a low - temperature flame.论述了锡氢化物的形成条件和物理化学特征.Forming conditions and physical and chemical...
The crew fought a losing battle to try to restart the engines.全体船员努力尝试重新启动发动机，但结果徒劳无功。The commissioners agreed to restart talks as soon as possible.委员们同意尽快重新开始会谈。They would now find some dubious pretext to restart the wa...
"Prices are down 40 per cent since Christmas," he lamented.“圣诞节以来物价降了4成，”他悲叹道。The bank yesterday revealed a 30 per cent nosedive in profits.该银行昨天透露其利润骤降30％。Costs have been cut by 30 to 50 per cent.成本降低了30%到50%。...