变心

tā yǒng bù biàn xīn

她永不变心。

She has an undying faith.

tā hái méi yǒu gào sù tā tā biàn xīn de zhēn zhèng yuán yīn

她还没有告诉他她变心的真正原因。

She still did not tell him the real reason for her change of heart.