unsteady heat conduction

例句：

1. 1. The construction of the bridge was unsteady due to the heavy rain.
   由于大雨，这座桥的建设是不稳固的。
2. 2.The team's performance was unsteady during the game.
   在比赛中，该队的表现是不稳定的。
3. 3. Thenew policy is unsteady and may lead to instability.
   新政策不稳定，可能导致不稳定。