have one's heart set on   (TTS發音)

want sth. very much；desire greatly十分想要

    Tim doesn't know what to do. His wife has her heart set on a fur coat for Christmas but he can't afford to buy it for her this year. 蒂姆不知如何是好，他的妻子一心想買一件皮外衣過聖誕節，但是他今年買不起。