millimeter of water

例句：

1. 1. The ruler is marked in millimeters.
   尺子上标有毫米。
2. 2. The distance between the two cities is about 500 kilometers, or 311 miles, which is equivalent to approximately 1.6 meters of water.
   两座城市之间的距离大约为500公里，相当于约1.6米的水深。
3. 3. The thickness of the material can be measured by measuring its length and width in millimeters.
   材料的厚度可以通过测量其长度和宽度以毫米为单位来测量。