英语词汇“Launch Checkout and Countdown System”的翻译、意思、用法、释义-英汉汉英双解词典

词汇	Launch Checkout and Countdown System
释义	Launch Checkout and Countdown System 基本搭配发射前检查和倒计时系统 check out退房结帐count down发射火箭等时倒读…
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