The apical membrane of the epithelial cells is apparently essential.上皮细胞的顶膜显然是必要的.Nothing but a great many epithelial cells was observed in the stain.染片中只观察到有大量的上皮细胞.Epithelial tissue occurs most commonly in sheets.上皮组织通...
We enjoyed the picnic until a thunderstorm intervened.那次野餐我们玩得很痛快,后来一场暴风雨使它中断了.The thunderstorm stampeded the cattle.大雷雨惊了牛群.In some way, positive and negative ions are developed in a thunderstorm.在雷雨中, 正离子和负离子以某种方式形成....
我尤其喜欢那种用螺钉固定在墙上的搁板。I particularly like the type of shelving that screws to the wall.请帮我把这只箱子从搁板上抬下来.Please lift the box down from the shelf for me.把这个箱子举到最上面一层搁板上.Heave the box onto the top shelf....