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硕士研究生入学统一考试英语试题及答案(2)]由[乐教网]提供下载交流学习，版权归原作者所有，大小为253 KB，
owing animals were easy game， and were quickly hunted to extinction.
now something similar could be happening in the oceans that the seas are being over-fished has been known for years what researchers such as ransom myers and boris worm have shown is just how fast things are changing. they have looked at half a century of data from fisheries around the world. their methods de not attempt to estimate the actual biomass （the amount of living biological matter） of fish species in particular parts of the ocean， but rather changes in that biomass over time. according to their latest paper published in nature， the biomass of large predators （animals that kill and eat other animals） inanes fishery is reduced on average by 80% within 15 years of the start of exploitation. in some long-fished ar硕士研究生入学统一考试英语试题及答案(2)
