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甲壳小咪
手机下载一个掌中英语就好了
长春小熊猫
标准但：Trees can stop the soil from being washed away.wash away 是冲走的意思，这句话里应该用被动语态，所以是being washed away. stop sb from doing sth 是个固定短语。
诗涵百草兔
"Our government should formulate a policy to prevent soil erosion"
鼠宝宝zhz
Trees can stop the soil from being washed away.
奔跑的流沙包
Our government should establish policy to prevent water and soil loss.
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