徒劳无益

not worth the candle

不值得, 不上算, 得不偿失

hold a candle to the sun 太阳底下点蜡烛, 多此一举; 作徒劳无益的事 | not worth the candle 不值得, 不上算, 得不偿失 | rush candle 微光; 微不足道的人; 孤陋寡闻

be up on one's high horse

趾高气扬

先按捺一下火气hold your horses keep your shirt on | 趾高气扬be up on one's high horse | 徒劳无益beating a dead horse That's over and done with

drop a bomb

引起轰动, 引起惊慌

drop a bomb 引起轰动, 引起惊慌. | drop a brick 出丑, 失言. | drop a bucket into an empty well 空井打水, 徒劳无益.

beton paint

混凝土用涂料

user parting 用户划分 | beton paint 混凝土用涂料 | flog a dead horse 徒劳无益

The Bothie of Toberna-Vuolich

<陶伯纳傅里克的茅舍>

Amours de Voyage <<航海恋>> | The Bothie of Toberna-Vuolich <<陶伯纳傅里克的茅舍>> | 'Say not the struggle nought availeth'<莫谓奋斗徒劳无益>

shoe lifter

鞋拔

shoe leather 皮鞋 | shoe lifter 鞋拔 | shoe the goose 徒劳无益

of a composite function：复合函数之导数

Derivative :导数 | of a composite function :复合函数之导数 | of a constant function :常数函数之导数

enriched lake：富营养湖

LRPA Long-Range Patrol Aircraft 远程巡逻飞机 | enriched lake 富营养湖 | bang it about 决胜负 诉诸武力