rein in片語動詞KK [ren ɪn] /ɹeɪn ɪn/發音片語動詞1控制、約束、抑制可拆開The new mayor promised to rein in city spending next year.新市長承諾明年要控制市政支出。2管束、收斂可拆開She had to rein in her temper during the long meeting.在漫長的會議中,她必須收斂自己的脾氣。3勒住、放慢He reined in his horse at the edge of the river.他在河邊勒住了馬。