改變口風;轉變態度;變卦
to express a different opinion or behave in a different way when your situation changes
Wait until it happens to him — he'll soon change his tune.等著瞧吧,到他遇上這事時,他很快就會改變看法了。
釋義來自《牛津高階英漢雙解詞典》第 9 版