countdown /'kauntdaun/ ★☆☆☆☆ 📖 中文释义 n. 倒计数[电] 指示串联中的操作数固定的记录减少 📘 English Definition(英文释义) n. counting backward from an arbitrary number to indicate the time remaining before some event (such as launching a space vehicle) ← countach C 字母词表 countdowns →