「後悔藥」怎麼解釋會比較恰當呢

If there is " regret " to sell in the world, this world is not a lot less regret ?
如果世界上有「後悔藥」賣,人世間是不是就少了很多遺憾?


If there is such a pity to be sold in this world , this world is not a lot less regret ?
如果有這樣的遺憾在這個世界上被出售，這個世界是不是就少了很多後悔？

If there is such a regret being sold in this world , this world is not a lot less regret ?
如果有這樣的後悔藥在這個世界上被出售，人世間是不是就少了很多遺憾？


If there is such a " regret " was sold in this world , this world is not a lot less regret ?
如果有這樣的“後悔藥”在這個世界上被出售，人世間是不是就少了很多遺憾？

regret --遺憾=後悔

不知道那個答案是你能接受的

千金難買早知道

以後下決定時就會認真的思考了

(1)What is done cannot be undone.
(2)If there were such a pill that can undo the things (on us) (on what is done), we would have nothing to worry about.
(3)If the pill had not been lamentable, we should have been regretful anything deeply.
(4)I regret that I lost my uninvented regretful pill.
=uninvented.
The Happy News:-
(5)If the pill had not been invented, we should have gone deeply regretful (adj)
=I regret that I forget my regretful (adj) pill
=We invented with (non-regret.)
=The Wanted News.

What is done cannot be undone.=覆水難收。（莎士比亞Macbeth）

If there were such a pill that can undo what is done, we would have nothing to worry then.

我們的理查，很久不見了～
大家都很掛念你啊～

如果世界上有「後悔藥」賣,人世間是不是就少了很多遺憾?
If there were such an 'undo pill' which allows you to start over the things again, would there be much less regrets in the world?

或是把 undo pill 換成 電腦的 undo button:
If there were an undo button to be clicked in life, would there be much less regrets in the world?

既然是不存在的東西, 應該用假設語氣.

2015-04-23 20:43:35 補充：
我也很想大家. 看到你們還在這裡為大家服務, 真的很開心. 你們能夠堅持下去, 都是我敬佩的人,

2015-04-23 22:12:35 補充：
If there were such a pill that can undo the things,...

> 事實上，這樣的藥並不存在。
誰說的?我都看過好幾次!

Sounds like the plots in some of the movies I know...
Edge of Tomorrow
Source Code
Prince of Persia, The Sands of Time

hit-the-reset-button-and-start-over-again remedy

reset-and-start-again remedy