In the last 30 years, thanks to explorations in remote parts of the world and advances in technology, biologists have, for example, added a full one-third of the known frog and other amphibian species, to bring the current total to 5,400, and more continue to pour in.
过去30年，人们去到了一些较为边缘的地区 也得益于科技的进步 生物学家使已知的青蛙以及两栖类物种数增加了三分之一 现在，两栖类生物物种总数为5400种 并且还不断有新的物种被发现