slack ice

例句：

1. 1.The slack ice was slippery and difficult to walk on.
   那层松弛的冰滑得让人难以行走。
2. 2.The ice was slack enough that it could easily be carved into intricate designs.
   冰很松，可以很容易地雕刻成复杂的图案。
3. 3. The slack ice was melting quickly in the sun's heat.
   太阳的热量使得这层松散的冰很快融化。