他不懂你的心假装冷静她不懂爱情把它当游戏
[tā bù dŏng nĭ de xīn jiă zhuāng lĕng jìng tā bù dŏng ài qíng bă tā dāng yóu xì]
He doesn't understand your heart, so he feigns calmness while she misunderstands love, taking it as a game. It illustrates emotional disconnection where someone pretends to be composed out of misunderstanding or fear, comparing others' approach to love as frivolous.