scavenging
['skævɪndʒɪŋ]
n.
净化，清除;
v.
（动物）以（垃圾、腐肉）为食( scavenge的现在分词 );
在（废弃物中）搜寻（食物、可用物品等）;
例句:
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The seaside fish market is a ready food supply for scavenging seabirds.
海边鱼市是觅食海鸟现成的食物供应地.
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In the event of a scavenging stage , it was introduced to achieve greater sensivity.
为了达到更高的灵敏度而要求浓缩处理.
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The category and scavenging mechanism of free radical scavengers were also presented.
概述了自由基的概念、对人体的危害以及自由基清除剂的种类和作用机制.
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There are a few people up there, scavenging still.
来自NEWYORKER
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It was too cold to waste energy scavenging through childhood memories.
来自NEWYORKER
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They are scavenging through metal trash bin, picking out packages of food.
来自NEWYORKER