讲解文本：

rigid 严格的，死板的，固执的

My father is very rigid in his thinking.

我父亲的思想非常死板。

You will not lose weight if you can't stick to this rigid eating program.

如果你无法坚持这个严格的饮食计划，你瘦不下来的。

疯狂练习吧!