underprep.低于；在 ... 下；在 ... 内；在 ... 控制下adv.在昏迷中；在 ... 下adj.下面的；从属的；少于的undercliffn.副崖

1. The DTA method was employed to measure the undercooling of samples during solidification.
   利用差热分析法测定了试样在相同冷却速度下的过冷度。
2. With the same cleanness, the undercooling of high clean steel is smaller than that of pure iron.
   在洁净度相同的情况下，高洁净钢形核凝固的过冷度比纯铁小。