在一年的这个时候开车驾驶在玉米带，一眼望去是成千上万公顷的玉米地，今年的大雨把这些玉米地严重侵蚀了。

All you have to do is drive through the cornbelt this time of year to see thousands upon thousands of acres of unprotected soil planted to corn that is eroding badly in this year’s torrential rains.

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在一年的这个时候开车驾驶在玉米带，一眼望去是成千上万公顷的玉米地，今年的大雨把这些玉米地严重侵蚀了。

All you have to do is drive through the cornbelt this time of year to see thousands upon thousands of acres of unprotected soil planted to corn that is eroding badly in this year's torrential rains.

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由于沿岸的营养流失和过度捕捞，海洋生态系统遭受由于海岸带侵蚀造成的水体营养水平改变，还有过度捕捞，也极大破坏了几乎全球各地的食物网。

Ocean ecosystems are beset by changes in nutrient levels due to run off near the coasts and by overfishing, which plays havoc with food webs nearly everywhere.

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