They always feel they made a wise decision to buy gold say two years back and wish they had bought more.

他们总觉得，比如说两年以前购买了黄金，是一个明智的决定，并且希望当时再多买一点就好了。

youdao

I wish we could turn the clock back two years and give the marriage another chance.

我但愿时光能倒退两年，再给我们的婚姻一次机会。

《牛津词典》

They live in the salt water from two to seven years, until they, too, are ready to swim back to reproduce.

它们会在盐水中生活2到7年，直到它们也准备好游回来繁殖为止。

youdao

Sixty-two years ago most of the remains were dug up and shipped back to China for reburial.

VOA: special.2010.07.23

But I try to go back every two years.

但我争取每两年回一次家乡。

旧金山的景点 - SpeakingMax英语口语达人

More than two hundred fifty thousand years ago Taurine cattle have no hump on their back.

VOA: special.2009.05.05

This was my retail stock of focus for a macro move two years back.

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Suzie is thrown into a rage that only the most only of only children can make manifest, then she realizes that the posts are from two years back.

CNN: Feel the relief of a Facebook purge

"I think two years back we would have loved to have been in Fernando's position, " said Vettel, who is hoping to become only the third driver to win three titles in a row after Juan Manuel Fangio, the great champion of the 1950s, and Vettel's fellow countryman Michael Schumacher.

WSJ: Vettel Leaves Nothing to Chance