五大湖存在非常多的斑马贝。它们不断地过滤水，把混沌的水变得清澈，随意摆弄着谨慎的生态平衡。
So many zebra mussels exist in theGreat Lakes, constantly filtering water, that they've changed the waterfrom murky to clear, fiddling with the careful ecosystem balance.
清澈的水倒影出的景色非常的迷人：所有恐怖的学校建筑在这一愉悦的时刻变得令人神往。
Its blue waters look enticing: for a happy moment, all the daunting school architecture is warmed and tamed.
清澈的水倒影出的景色非常的迷人：所有恐怖的学校建筑在这一愉悦的时刻变得令人神往。
Its blue waters look enticing: for a happy moment, all the daunting school architecture is warmed and tamed.
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