221 sentences for 了解 (liǎo​jiě — understanding) — page 12 of 12

221. 了解如何以及何时道别，通常是很困难的，即便是在非正式的场合也是一样。

     liǎo​jiě rú​hé yǐ​jí hé​shí dào bié, tōng​cháng shì hěn kùn​nan de, jí​biàn shì zài fēi​zhèng​shì de chǎng​hé yě​shì yī​yàng.

     Knowing how and when to say goodbye is often difficult, even in informal situations.

     Source: CCMatrix