{"countdown":{"definition":"n. counting backward from an arbitrary number to indicate the time remaining before some event (such as launching a space vehicle)","phonetic":"'kauntdaun","translation":"n. 倒计数\n[电] 指示串联中的操作数固定的记录减少","word":"countdown"},"countdowns":{"definition":"n. counting backward from an arbitrary number to indicate the time remaining before some event (such as launching a space vehicle)","phonetic":"ˈkaʊntˌdaʊnz","translation":"n. （发射宇宙飞船等的）倒数读秒, 倒计时( countdown的复数形式 ); 大事临近的时期","word":"countdowns"}}