clearness

The clearness of the Caribbean water allows divers to see colorful coral reefs thirty feet below.

(Chinese) 加勒比海水的清晰度让潜水员能看清下方30英尺处的彩色珊瑚礁。

I appreciated the clearness of his explanation, which made a very complex topic easy to understand.

(Chinese) 我很赞赏他解释的清晰度，这让一个非常复杂的主题变得易于理解。