天文学家将迅速将这颗地球大小的行星包围，在那里他们发现与我们的太阳系相似的行星系统。
Astronomers are quickly closing in on Earth-size planets elsewhere in the galaxy as they find planetary systems that look more and more like our solar system.
血视网膜屏障包围着眼睛，把载体限制在内的同时，几乎把免疫系统阻隔在外。
It is enclosed by the blood-retina barrier, keeping viruses in and the immune system mostly out.
这些类似真细胞的“原细胞”被油脂分子包围。膜上浮动的的蛋白只会让某些离子通过。利用这个系统，研究人员发现他们可以将电鳗的发电机能复制出来。
These, like real cells, were surrounded by membranes made of fatty molecules. Proteins "floating" in the membranes would let only certain ions pass.
应用推荐