n. 
积层,淤积层
近义词
n. 
词
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come under,
come under heavy criticism,
come up,
come up against,
come up smiling,
come up to,
come up with,
come upon,
come-along,
come-and-go,
相似单词
alluvial fan,
alluvial soil,
alluviation,
alluvideserta,
alluvion,
alluvium,
all-wave,
all-weather,
all-welded,
allwork,