noun🔗Share倒计时，读秒。 A count backward in fixed units to the time of some event, especially the launch of a space vehicle."The class watched the countdown on the screen as the model rocket prepared for launch. "班级里的同学们注视着屏幕上的倒计时，模型火箭准备发射了。timetechnologyspaceastronomyeventChat with AIVocabulary GamePractice Reading
noun🔗Share倒计时，读秒阶段。 The acts of preparation carried out during this period."During the launch countdown, engineers checked all the systems. "在发射倒计时，读秒阶段，工程师们检查了所有系统。actiontimeeventprocessChat with AIVocabulary GamePractice Reading
noun🔗Share排行榜 A radio or television program counting down the top songs of a given week, usually in reverse order ending with the No. 1."The radio station's weekly countdown of the top songs was always a highlight of my commute. "这家电台每周的热门歌曲排行榜倒数节目一直是我通勤路上的亮点。mediaentertainmentmusicnumberChat with AIVocabulary GamePractice Reading
verb🔗Share倒计时， 倒数。 To count down."We will countdown from ten to launch the model rocket. "我们将从十开始倒数，来发射模型火箭。timenumberactionChat with AIVocabulary GamePractice Reading
