英语词汇downward selection怎么读，是什么意思，单词翻译、读音、固定搭配用法和短语词组及例句-英汉双解词典

单词	downward selection
释义	downward selection 简明释义向下选种网络释义 1 ?向下选择向下选择双语例句 1 Researches on the automatic selection of matching areas in the downward-looking matching system were made. 研究了下视景象匹配区的自动选择方法。
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