These crustaceans provide a valuable food source for some fish.这些甲壳纲动物是某些鱼类重要的食物来源.When the tide ebbs it's a rock pool inhabited by crustaceans.退潮时，它便成为甲壳动物居住的岩石区潮水潭。Sir. J . Lubbock has recently remarked , that sev...
small freshwater crustaceans with a shield-shaped carapace长有盾牌状甲壳的小型淡水甲壳动物Sir. J . Lubbock has recently remarked , that several minute crustaceans offer excellent illustration of this law.卢布克爵士最近指出, 小型甲壳类中有几种较好的例子,可作为这一法...
The roosters were crowing and the dawn was not far off.雄鸡报晓,黎明即将来到.As the roaring rocket rose the restless roosters rollicked.随着喧哗的烟火上升,不安宁的公鸡在闹玩.They had black crusts and they crowed like roosters!它们有着黑色的外壳,它们会像公鸡一样啼叫!...
He was a favorite with his schoolmasters but not his schoolmates.学校的老师们很喜欢他，但同学们对他并不待见。Her close relationship with the teacher increased her unpopularity among her schoolmates.她和那位老师的密切关系使她在同学中越发不受欢迎.She is fond of flaun...
After setting, the surfaces of the specimens are ground down using carborundum and alumina.凝固之后, 样品表面连续用金钢砂或氧化铝磨平.Activated carbon, alumina are often used to remove many types of organic materials from aqueous streams.常用...
我每天都穿那双旧鞋，有一只鞋底已经脱胶了。I wear my old shoes every day. One sole has come unglued.双梯形的试样将产生切变脱胶现象.A double trapezoidal specimen will generate shear debonding.真丝绸脱胶是真丝绸染整加工的一道重要工序.Silk degumming is a key process for silk dyei...