For instance, more and more animal species are on the verge of extinction. This is an alarming sign that something might have gone wrong in the quality of our environment.举例来说，越来越多野生动物濒临绝种，显示出环境的质素可能出现了问题。.If we continue to destroy the countryside many more animal will become extinct.我们若继续破坏自然环境,将会有更多的动物绝种。These animals ...
