大多数自然资源保护主义者认为，在良好的生态环境中人类最易兴旺发达，而各种野生动物的生存则是这种良好的生态环境的标志。1. Most conservationists believe that humans thrive best in ecological health and that the sign of this health is the survival of a diversity of wild animals.史密斯先生出示了大量的证据来表明：在某种程度上，如果我们破坏大自然，那就是毁灭我们自己。2. Mr. Smith produced abundant evidence to indicate that we, to some extent, diminish ourselves if we diminish nature.西方各国的许多城市已经转换到使用新的可减少污染含量的汽油，我们中国有些城市也已经这样做了。3. Many cities in Western countries have switched to a new gasoline
