这种物质很容易由甲醛和肼反应而得到.The material is readily prepared by reaction of formaldehyde and hydrazine.甲醛能慢慢使多种病毒失去活性.Formaldehyde slowly inactivates many viruses.二氧化硫和甲醛都可产生刺激.Sulfur dioxide and formaldehyde both produce irritati...
He glossed over his selfishness with a display of generosity.他以慷慨大方的假象掩饰他的自私.The manager glossed over the team's recent defeat.经理对这个队最近的失败闪烁其词.This fact glossed over the colorful foretime of Singapore.这一事实却掩盖了新加坡多姿多...
The boat wallowed helplessly in the stormy sea.那艘船在波浪滔滔的大海中无力地颠簸行驶.She watched helplessly as her husband was dragged away.她眼睁睁地看着丈夫被拉走了。Cross-currents can sweep the strongest swimmer helplessly away.即使最强壮的游泳者也会无助地被交叉水流冲走...
He mentally visualizes a complex form all round itself.他在脑海里从形体的各个方面来模拟复杂的形体.He is much older, but do you think he visualizes scenarios , exchanges?他年纪大很多你对他可有想入非非?Longitudinal displacement measures myocardial motion amp...