once in a while片语KK [wʌns ɪn ə waɪl] /wʌns ɪn ə waɪl/发音片语1偶尔、有时、间或We still meet for coffee once in a while, usually on weekends.我们偶尔还会约喝咖啡,通常是在周末。用这个字练口说→