请谅解我迟到的原因。

Qǐng liàngjiě wǒ chídào de yuányīn.

Please understand the reason for my lateness.

他对你的决定表示理解和谅解。

Tā duì nǐ de juédìng biǎoshì lǐjiě hé liàngjiě.

He expresses understanding and forgiveness for your decision.

在沟通中要彼此谅解对方的观点。

Zài gōutōng zhōng yào bǐcǐ liàngjiě duìfāng de guāndiǎn.

In communication, we should understand each other's perspectives.