一死百了万念俱灰 death pays all debts and all thoughts are dashed
一了百了 1.(主要问题解决了其他问题也跟着解决) one finished, all is finished.; all troubles end when the main trouble ends.; as the main item has been solved, all the rest items are therefore solved.2.(死结束了一个人的一切烦脑) death ends all one's troubles.: 一去世, 他的苦恼就一了百了了。 with his death all his woes ended
决一死战 wage a life-and-death struggle; determine to fight to the death; fight sb. to the death; fight to a finish [to the very last]; fight to one's death; fight with a rope round one's neck; fight with ... to the death; risk all in one desperate battle;wage a fierce [a decisive] battle