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He learned this lesson the hard way – from his own personal experience.

他惨痛地得到了这一教训–从他自己的亲身经历中得来的。

《柯林斯英汉双解大词典》

Everything he achieved in life was earned the hard way and his success in the literary field was no exception.

他在生活中所取得的一切都是来之不易的，其在文学领域的成功也不例外。

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Many Americans learned this the hard way by investing all their money in stock shares, which then lost value.

VOA: special.2011.03.27

PROFESSOR BAWENDI: The only But it's hard to imagine an irreversible compression the way we can just imagine an irreversible expansion.

,但是我们很难,像描述不可逆膨胀一样,来描述不可逆压缩。

麻省理工公开课 - 热力学与动力学课程节选

So on your computer's hard drive are again, a whole bunch of tiny magnetic particles aligned this way or this way.

因此，你的电脑硬盘是完全是,有一簇按照这种方式排列的磁性粒子。

哈佛公开课 - 计算机科学课程节选

The university president, like many before him on other campuses, found out the hard way.

CNN: Rutgers president needs reality check

Many businesses are learning this the hard way and paying a hefty price in the process.

FORBES: Perfect Power: Clean Energy's Killer App

Wal-Mart has learned the hard way that a first-mover advantage can be important in international retailing.

WSJ: Wal-Mart Bids $4.6 Billion for South Africa's Massmart