人类环境的保护和改善是影响到世界人民幸福和经济发展的主要问题。
The protection and improvement of the human environment is a major issue which affects the well-being of peoples and economic development throughout the world.
今天,许多人开始意识到,为了保护环境和为了人类的生存,我们需要更多的人成为素食者。
Today, many people have come to realize that to help the environment and for the human race to survive, more of us will need to become vegetarian.
研究人员注意到,这些结果说明由人类引起的环境变化将会导致这些鸟类在约200世代内出现生物多样化。
The researchers noted that these results suggest human caused environmental change can lead to animal diversification in about 200 generations for these birds.
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