英语语法分析

Such parts are often considered to be thankless, unrewarding.

这种角色通常被认为是吃力不讨好的。

Why is it so unrewarding for politicians to bash the rich in America?

为什么美国政客都不愿意对富人进行打击呢？

Low interest rates have made bonds and bank deposits unrewarding too.

同时低利率已经让债券和银行存款变得无利可图。