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...
Women wear aprons in the kitchen.妇女在厨房里围着围裙.The chambermaid in our corridor wears blue checked gingham aprons.给我们扫走廊的清洁女工围蓝格围裙.Obstruction in the movement of Aprons during doffing in modern cards.新型梳棉机在落卷时皮板输送带(或皮圈,围裙)运行...