他很穷，穷得几乎无以为生。
于是欧洲兔子遍及整个澳洲大陆。它们掘洞挖穴，滥食牧草，造成草地的严最破坏，使数百万头牛羊无以为生。
It overran a whole continent. It caused devastation by burrowing and by devouring the herbage which might have maintained millions of sheep and cattle.
于是欧洲兔子遍及整个澳洲大陆。它们掘洞挖穴，滥食牧草，造成草地的严最破坏，使数百万头牛羊无以为生。
It overran a whole continent. It caused devastation by burrowing and by devouring the herbage which might have maintained millions of sheep and cattle.
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