protract相关的词根或词缀是: tract

The cat can protract its paws .

猫能伸其爪。

Delay always breeds danger ; and to protract a great design is often to ruin it .

推迟经常孕育危险；拖延一个伟大的工程常常意味着毁灭它。

We may protract thousands of commercial oil paintings each month .

我们每月可以绘制数千副商业油画。

Protract the profit of their chilled delirium .

延长它们冰冷了的昏话的利益。

A hours have passed since the discussion was be gun , and I 'm afraid they will protract it still longer .

这个讨论会已经开了1个小时了，而且恐怕他们还会拖延下去的。