unsteady mass transfer

例句：

1. 1.The ship was unsteady in the strong winds.
   在强风中，这艘船摇摆不定。
2. 2. The new policy is unsteady and may lead to instability.
   新政策不稳定，可能导致不稳定。
3. 3. The economy is unsteady due to the sudden drop in oil prices.
   由于石油价格的突然下跌，经济变得不稳定。