He works extremely hard and therein lies the key to his success.

他工作极其努力，这就是他成功的关键。

《牛津词典》

In the story of the Swifter, he argues, we have the key elements in producing breakthrough ideas: frustration, moments of insight and sheer hard work.

他认为，在 Swifter 的故事中，我们拥有产生突破性想法的关键要素：挫败感、顿悟的时刻和纯粹的努力工作。

youdao

A key decision required of advertising managers is whether a "hard-sell" or "soft-sell" strategy is appropriate for a specific target market.

广告经理关键要决定到底是“硬销售”还是“软销售”策略适合特定的目标市场。

youdao

"Iraq's future is in the hands of its own people, and Iraq's leaders must now make some hard choices necessary to resolve key political questions, to advance opportunity and to provide security for their towns and their cities,"

VOA: standard.2009.06.30

"Having a dedicated hard key is a nice touch and it might help differentiate Nokia's Asha line, " said Roberta Cozza, research director at tech analysis firm Gartner.

BBC: Asha 210

As for its hard key layout, all of those buttons (volume, power and dedicated camera key) reside on the right, with nothing but a 3.5mm headphone jack up top and microUSB port at its base.

ENGADGET: Nokia Lumia 720 preview: a slim and 'trendy' Windows Phone 8 handset for the social networking set (update: video)

Disk-drive companies were hit hard after key suppliers were knocked out of commission.

FORBES: Managing The Risks Of A Globalized Supply Chain