Confidence is the key to success.

信心是成功的关键。

《牛津词典》

The key to success is preparation.

成功的关键是准备。

《牛津词典》

We all believed that work was the key to success.

我们都曾经相信工作是成功的关键。

《柯林斯英汉双解大词典》

Military officials acknowledge that Kandahar is the key to success in Afghanistan.

VOA: standard.2010.05.26

I think that's probably the biggest key to their success.

我觉得这也许是他们成功最重要的一点。

体罚是不可取的 - SpeakingMax英语口语达人

"The key to long term success in this area is our outreach with foreign governments."

VOA: standard.2010.07.23

For most elite athletes, the key to success is exceptional talent and world-class athletic ability.

FORBES: Magazine Article

However, the key to success is not simply a review of the numbers on a ledger.

FORBES: Independent Recovery Audits Of Medicaid Can Save Billions

Turns out the key to success in chips was not cheaper production but developing advanced architecture.

FORBES: Fact and Comment