The more difficult something became, the more rewarding it was in the end.

语音讲解：
单词发音
difficult /ˈdɪfɪkəlt/
became /bɪˈkeɪm/
rewarding 英 /rɪˈwɔːdɪŋ/ 美 /rɪˈwɔːrdɪŋ/
词间连读
it was in the end /ɪwəz'ɪnði'jend/

词汇讲解：
rewarding adj. 值得的； 有报酬的
reward noun. 报酬
award, reward, prize
三者的含义基本相同，但在不同语境中表达的含义有所差别。
award 指正式地或官方地颁发，授予，给予；也可以指法庭裁决给予。如：
The school principal awarded a prize in history to the best student.
学校校长将历史奖授予最出色的学生。
reward “报答，报偿，奖赏”，表示由于做了某事而应该得到的东西。如：
The fireman received a reward for saving the child's life.
因救了小孩的命，消防员提到一笔奖金。
prize “奖赏，奖金，奖品”，尤指在比赛中获得的荣誉。如：
Hundreds of prizes can be won in our newspaper competition.
参加我们报纸的竞赛可以赢得数以百计的奖品。

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