there’s many a slip (’twixt cup and lip)是什么意思

词组 there’s many a slip (’twixt cup and lip) 释义 ●there’s many a slip (’twixt cup and lip) (saying) (of plans, hopes, etc. 计划、希望等) nothing is completely certain until it happens because things can easily go wrong 酒杯到口，还会失手；万事难以...