湖水非常清澈，可以看到水底的石头。

Húshuǐ fēicháng qīngchè, kěyǐ kàndào shuǐdǐ de shítou.

The lake water is very clear; you can see the stones at the bottom.

她有一双清澈的大眼睛。

Tā yǒu yì shuāng qīngchè de dà yǎnjing.

She has a pair of clear, bright eyes.