I will tell you the answer for once and for all.

那个答案，我只告诉你这一次。

youdao

I will answer your question for once and for all.

我回答你的问题仅此一次。

youdao

She said that lines must be drawn for once and for all between the present and the possible.

她说必须彻底划清现在与可能性之间的界限。

youdao

And they think, cause there was a study once, which said that all included tourism is the best thing for a third world country, and so they said,well, that is what they want, and they want to have a water source, and they want to have golf,and a marina,".

VOA: standard.2009.06.04

You just need to remember what's happening to z effective, which really tells us what's happening with all the trends, and once you know z effective, you can figure out, for example, what direction the atomic radius should be going into.

你只需要记住有效核电量的规律，实际上它会告诉我们所有的规律，只要你知道了有效核电量的规律，你就可以判断，比如，原子半径会向着哪个方向发展。

麻省理工公开课 - 化学原理课程节选

First, the Treaty declared that the individual sovereign state would henceforth become the highest level of authority; you might say, putting an end once and for all " to the universalist claims of the Holy Roman Empire.

第一，条约宣称,各个主权国家,都因此而成为各自国家里最高的权力;,永远终结了,普遍意义上的“神圣罗马帝国。

耶鲁公开课 - 政治哲学导论课程节选

Settling the border issue for once and for all, he says, is crucial for the people of Wazzani.

NPR: After Israel: A Lebanese Village Struggles

"We are determined to resolve it for once and for all, " he said.

BBC: News Online

It could happen again, but Congress also could radically simplify the personal income tax and eradicate earmarks for once and for all.

FORBES: Who Wants To Bet On 2% Inflation?