The small roads are chock-a-block with traffic.条条小路全挤满了车马行人。The shelves were chock-a-block with ornaments.架子上堆满了装饰品。The 32-page catalog is chock-full of things that add fun to festive occasions.32页的目录尽是些渲染节日喜庆的东西。...
The rotation of flagella pushes the bacteria through the water.鞭毛的旋转可以推动细菌在水中行进。Microtubules are also used in the construction of centrioles , basal bodies , cilia and flagella.微管还用于建造中心粒,基体, 纤毛和鞭毛.The length of the flag...