They made a 3,000 mile detour simply to prove a point.是什么意思？

They made a 3,000 mile detour simply to prove a point.

他们绕行3,000英里只是为了证明自己能够做到。

they

pron. 他/她/它们，人们，大家，政府，当局，她们；

例句
The storms had abated by the time they rounded Cape Horn.
他们绕过合恩角时，暴风雨已经减弱。

made

adj. …制的，（人工）做成的，拼成的，虚构的，保证成功的；v. 使(make的过去式和过去分词)；

例句
Single people are treated as an aberration and made to pay a supplement.
独身者被当成异类，而且要付一笔额外的费用。

mile

n. 英里，很远的距离，一英里赛跑；

例句
Oil has come ashore on a ten mile stretch to the east of Plymouth...
绵延10英里的浮油已经到达了普利茅斯东岸。

detour

v. 绕路，绕道；n. 绕道，弯路；

例句
He was happy to make a detour for her convenience.
为了她方便，他很乐意绕道。

simply

adv. 简单地，朴素地，（引出概括或解释）不过，仅仅，简直，<非正>实在；

例句
Many parents simply abdicate all responsibility for their children.
许多父母对孩子简直是完全撒手不管。

to

prep. 向，朝着，到，关于，属于；adv. 朝一个方向的，到某种状态，关闭；

例句
I suggest you leave it to an expert...
我建议你把它留给专家来解决。

prove

vt. 证明，证实，[法]验证，检定，显示；vi. 显示出，证明是；

例句
I have to prove myself as a respectable, balanced, person.
我必须证明自己是个正派、稳重的人。

point

n. 点，要点，得分，标点；vt. （意思上）指向，削尖，加标点于，指路；vi. 表明，指向；

例句
He was abrupt to the point of rudeness...
他的唐突已到了无礼的地步。