Although the coral looks hard, it is very delicate.

虽然那珊瑚看起来坚硬，它其实非常易碎。

《柯林斯英汉双解大词典》

Although they are pretending hard to be young, grey hair and cellulite give them away.

尽管他们尽力装出年轻的样子，但是灰白的头发和皮下脂肪团却暴露了他们的真实年龄。

《柯林斯英汉双解大词典》

Although he worked hard, failure was all that he had seen.

虽然他很努力工作，但是他失败了。

youdao

Freud worked hard, although what he did might sound easy.

VOA: special.2010.04.13

Although hard work can create success, what follows, as night follows day, is arrogance.

FORBES: The Arrogance Of The Obama Administration Will Bankrupt Us

For the Conservatives it is easier to see the headline attraction of going further on welfare (although hard, Nick Boles' speech suggests how: deep into tax credits and benefits).

BBC: A tough end to a tough week for Nick Clegg

Although hard skills like sales and software knowledge can get you through the door, more companies are asking for soft skills as well from job candidates, finds a recent study by Millennial Branding, a consulting firm in Boston.

WSJ: Cultivating Your 'Soft Skills' Can Help You Get Ahead in Your Job