英语词汇“back stopping”的翻译、意思、用法、释义-英汉汉英双解词典

词汇	back stopping
释义	back stopping 基本英英上向梯段回采名词 backstop: baseball the person who plays the position of catcherbaseball a fence or screen as behind home plate to prevent the ball from traveling out of the playing fielda precaution in case of an emergency
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