词语proper motion
解释自行
词性名词
proper motion〔名词〕自行详细»
proper motion〔名词〕固有运动详细»
proper motion正常运动，自然运动详细»
自行of itself;of ny own accord;of own accord;proper motion详细»
自行of itself;of own accord;oneself详细»
自行of own accord详细»
自行proper motion详细»