under the sun片语KK [ˋʌndɚ ðə sʌn] /ˈʌndɚ ðə sʌn/发音片语1天下、世上、天底下They chatted for hours about every topic under the sun.他们聊了好几个小时,天下什么话题都谈到了。2究竟、到底口语、旧式What under the sun made you sell that beautiful old house?你究竟为什么要把那栋漂亮的老房子卖掉?用这个字练口说→