◎勞而無(wú)功
[bay the moon;work hard but to no avail;accomplish little; fool's errand; milk the bull; preach to the winds wash a blackamor white] 費(fèi)了力氣但沒(méi)收到成效
與不可,強(qiáng)不能,告不知,謂之勞而無(wú)功?!?span id="qewknit" class="bold">《管子·形勢(shì)》
(好工具)花費(fèi)了精力,卻毫無(wú)功效或收獲。《莊子.天運(yùn)》:「今蘄行周于魯,是猶推舟于陸也,勞而無(wú)功?!埂秴问洗呵铮⑿杏[.本味》:「求之其本,經(jīng)旬必得;求之其末,勞而無(wú)功?!挂沧鳌竿絼跓o(wú)功」。