几千年来，每一块大陆上的人们都过着与祖辈父辈们相同的生活。
For thousands of years, people on every continent lived much the same way their parents and grandparents lived.
长期生活在城市的居民，其后代的遗传基因里，对肺结核的抵抗力更强。究其原因，是几千年来城市生活进化选择的压力为人类所做出的贡献。
The descendants of long-time urban dwellers show increased genetically-driven resistance to tuberculosis, due to evolutionary selection pressure over millennia. Christopher Intagliata reports.
几千年来，人们发现醋有许许多多奇妙的用途，吃醋确实是一种好的生活习惯。
For thousands of years, people have found vinegar there are many wonderful USES, jealous indeed a good lifestyle.
很多沼泽地带的阿拉伯人，几千年来他们一直生活漂浮在这片稀有的水域上的不够牢固的家中。如今由于栖息地的消失他们被迫背井离乡。
Many of the Marsh Arabs, who have lived on their fragile, near-floating homes in this rare water world for millennia, have now been forced to flee as a result of the collapse of their habitat.
很多沼泽地带的阿拉伯人，几千年来他们一直生活漂浮在这片稀有的水域上的不够牢固的家中。如今由于栖息地的消失他们被迫背井离乡。
Many of the Marsh Arabs, who have lived on their fragile, near-floating homes in this rare water world for millennia, have now been forced to flee as a result of the collapse of their habitat.
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