Noun:

1. exercising in preparation for strenuous activity

tune-upn.发动机的调整；热身活动

prolusionn.预演；序幕；序乐；开场白

1. See him coming from the dugout to warm up.
   您看他从地下室里出来了，开始做准备动作。
2. A pitcher must always throw several practice balls in order to get warmed up before starting a game.
   比赛开始前，投球手总得先投几球作为准备动作。
3. Christensen does his usual push-ups to warm up.
   克里斯腾森作着他通常作的上举运动进行热身。
4. The children were bouncing constantly to keep warm.
   孩子们不断的蹦跳，以便热身。