up in the air片语KK [ʌp ɪn ðə ɛr] /ʌp ɪn ðə ɛɹ/发音片语1悬而未决、未定、尚无定论Our vacation plans are still up in the air because of work.因为工作的关系,我们的假期计划还悬而未决。用这个字练口说→