This orbiting telescope is the largest optical instrument in space.这种轨道望远镜是宇宙中最大的光学仪器.Let's pretend we're on the spaceship orbiting round the earth!让我们假装是在沿轨道绕地球运转的宇宙飞船上!Twenty incoming flights were stacked up ...
Autophagy is a vacuolar process of cytoplasmic degradation by lysosome.自噬是以细胞质空泡化为特征的溶酶体依赖性的降解途径.Vitamins function as photoreceptor mechanism of retina, maintenance of integrity of epithelia, lysosome stability, glycopro...
The drum is one of the oldest musical instruments.鼓是最古老的乐器之一。When you beat the drum, you feel good.敲鼓的时候感觉很好。A long drum roll introduced the trapeze artists.长长的一阵紧锣密鼓声中迎来了高空秋千表演者。...