He succeeded in inventing the telephone by hard efforts.

他以艰苦的努力成功地发明了电话。

youdao

To achieve our goal we must make hard efforts to solve problems ahead.

要实现我们的目标我们必须努力解决我们面临的问题。

youdao

His wonderful dream vanished into the air despite his hard efforts to achieve his goals.

他为实现自己的目标付出了最大的努力，但最后美好的梦想还是化成了泡影。

youdao

Still, the left has become fractured in spite of the hard work and efforts of the many activists, union organizers, and so forth.

FORBES: The Decline of the Populist Left and the Rise of the Tea Party

Despite all his efforts and hard work, Sumathipala's detractors have other ideas about him.

BBC: Sri Lanka's power struggle

Last November, I was honored to be part of a Kiwanis International delegation that traveled to Sierra Leone to witness MNT elimination efforts in hard-to-reach rural villages.

WHITEHOUSE: Spreading the Word About Tetanus