词典释义：
n.黑变病
Objective To investigate the riskfactorsfor development of melanosis coli.
目的:探讨结肠黑变病的相关致病因素.
Objective:To investigate the pathogenic factors of colon melanosis and its outcome.
目的：探讨结肠黑变病的致病因素及转归。
Objective: To investigate the pathogenic factors of colon melanosis and its outcome.
目的：探讨结肠黑变病的致病因素及转归。
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