high and low

例句：

1. 1.The waves were high and low all day long.
   海浪一整天都在高低起伏。
2. 2.The road was high and low, making it difficult to navigate.
   道路高低不平，难以导航。
3. 3.The weather was high and low, with sunny spells alternating with rainy ones.
   天气高低起伏，阳光和雨水交替出现。