接触的细胞的原生质体通过原生质连丝连接成一体.The protoplasts of attached cells are connected and integrated by plasmodesmata.果胶物质分成原生质果胶, 果胶和果胶酸.The pectic substances can be classed protopectins, pectins and pectin acids.每个细胞都具有核,细胞核位于原生质中.Ea...
The little boy was speechless with shock.那小男孩惊得说不出话来。Alex was almost speechless with rage and despair.亚历克斯又生气又绝望，几乎说不出话来。Laura was speechless with rage.劳拉气得说不出话来。...
一贯性急冲动的他又宣布要退学了。With characteristic impetuosity, he announced he was leaving school.青少年自杀很少是由于突然发生不幸而作出的冲动反应。Adolescent suicide is rarely an impulsive reaction to immediate distress.他容易冲动，很难成为值得依赖的首相。He is too impulsive ...
布劳顿星期一称病请了一天假来粉刷栅栏。Broughton took a sickie on Monday to paint his fence.学生时不时会称病缺课.Students occasionally allege illness as the reason for absence.她答称病了.She answered that she was ill....
深海声纳式高度计是装备在深海探测设备上的回声测深装置.Abstract : Deep - sea sonar altimeter is a depth sounder to equip deep - sea detection devices.高度计是用来测量海拔高度的.An altimeter is used for measuring height above sea - level.介绍一种适用于微型飞行器的新型微型 高度计 的设...