He usually moseys into town for no special reason.

他常无所事事地溜达到城里。

《柯林斯英汉双解大词典》

Maybe because of a special reason that I can't describe.

也许有啥特殊的理由，但是我说不出来。

youdao

If you can not arrive on time due to any special reason, Please apply for deferred registration to Registry Department in advance.

如因特殊情况不能按时报到，请务必于正式开课前向教务处申请办理暂缓注册手续。

youdao

Is there any special reason that you chose that class?

有没有一些特殊的原因促使你选择了这门课程呢？

最喜欢的一门课 - SpeakingMax英语口语达人

Of those Nasa missions in action today, the Messenger venture at Mercury has a special reason to thank its Leros hardware.

BBC: Juno Jupiter probe gets British boost

We call it Joining Forces for a very special reason.

WHITEHOUSE: Joining Forces to Support Military Families

There is no such special reason for Beijing.

CNN: Filling A Gap