unfrozen lake

例句：

1. 1. The unfrozen lake is a popular spot for fishing and swimming.
   这个未冻结的湖是钓鱼和游泳的热门地点。
2. 2.In the winter, the lake becomes a frozen wonderland.
   冬天，湖面变成了一个冰冻的奇景。
3. 3. The lake has been unfrozen by the warm weather.
   天气变暖后，湖已经解冻了。