Bié / kàn / tā / shì / gè / táo / qì / bāo / guān / jiàn / shí / hou / hái / shi / hěn / dǒng / shì / de

别看他是个淘气包，关键时候还是很懂事的。

Although he is a mischievous little rascal, he behaves well when it matters.