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ob
英英字典
同义
ob
ob river
词性
n
解释
a major river of western Siberia; flows generally northward and westward to the Gulf of Ob and the Kara Sea
示例
None
同义
ob
obstetrics
midwifery
tocology
词性
n
解释
the branch of medicine dealing with childbirth and care of the mother
示例
None