cold as a frog

例句：

1. 1. The weather is cold today.
   今天天气很冷。
2. 2. She wore a coat to keep warm in the cold weather.
   她在寒冷的天气里穿了一件外套来保暖。
3. 3. The lake was frozen solid, making it difficult to cross.
   湖面结冰了，很难过河。