troubled water的用法和样例：
例句
- The choppy water looked very complicated but it was a very easy effect to create just using two colors and allowing some of the white of the paper to show through.
波涛汹涌的海水看起来非常复杂，但是其实很好画，只要用两种颜色再露出一些画纸的白色就行了。 - It's good fishing in troubled waters.
混水好摸鱼。 - Changing temperatures in the lake during the winter could have brought stagnant water to the surface, thus asphyxiating entire schools of fish.
冬季湖中温度的变化将把底部混水带到表层，这样会导致整个鱼群的窒息。
