单词：organics
[化] 有机物
n a fertilizer that is derived from animal or vegetable matter
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And in fact, Curiosity -- which has been roving on the surface now for about three years -- 事实上，好奇号探测车，在火星表面上漫游已经有三年了 has really shown us that it's sitting in an ancient river bed, where water flowed
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