Vigilante work is unrewarding .

维吉兰特工作是吃力不讨好。

This proved a decidedly unrewarding tusk .

结果证明这绝对是件不值得做的工作。

Markets today would not tolerate unrewarding and risky investment on this scale .

今天的市场不会容忍没有回报又如此高风险的投资。

You find the process of reaching the goal boring , frustrating , or unrewarding .

你发现实现目标的过程乏味不堪、令人沮丧甚至根本不值得。

Learning a language often seems unrewarding at the time .

学习一种语言往往一时似乎无所得益。