As clear as crystal Very clear; transparent; easy to understand

• 清彻地；透明的;容易明白地

As clear as crystal Very clear; transparent; easy to understand的用法和样例：

例句

1. The water in the ocean was as clear as crystal.
   海洋里的水很清彻。
2. All the dialysate fluids were clear after treatment.
   处理后腹膜透析液均变为清彻。