purity

The laboratory tested the water samples to ensure the purity of the local drinking water.

(Chinese) 实验室检测了水样，以确保当地饮用水的纯度。

The white lily is often used in art as a traditional symbol of innocence and purity.

(Chinese) 白百合在艺术中常被用作纯真和纯洁的传统象征。