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词根记忆：来自scarce(a．缺乏的，不足的)
例：Either food scarcity or excessive hunting can threaten a population of animals.
同根词：scarceness（n．稀少，缺乏）
2.scatter v. 分散，散开(to disperse)
例：Billions of meteors are scattered across the galaxy.
3.scavenge v.清楚（to cleanse）；从废物中提取有用物质(to salvage from discarded or refuse material)
例：A jackal is a kind of animal that scavenges rotten meat.
派生词：scavenger(n．清除剂)
4.scent n.气味(smeIl),香味(fragrance)
联想记忆：开放的花朵送出(sent)沁人的香气(scent)
例：A chemical is added to natural gas to give it a scent.
5.scheme n．方案(a plan or program of action)
词根记忆：注意：schema(n．图表，图解)
例：coding scheme编码方案
6.scorn v./n.轻蔑(to despise)；嘲笑(to mock)
联想记忆：s+corn(玉米)--把别人当成玉米棒子--轻蔑
例：The disgruntled worker showed scorn towards his employer.
The team scorned the player who lost the game.
派生词：scornful(a．轻蔑的；嘲笑的)
