What this actually means is unclear, but 725 customers is such an insignificant number that one has to wonder why it was mentioned at all.

这句话所要表达的意思很匪夷所思，但725个客户实在是个微不足道的数目，都不值得拿出来说。

youdao

At least 24 men are thought to be trapped but the exact number underground at the time of the incident remains unclear, the agency said.

至少24人被困，但确切数字不明，该机构说。

youdao

It remains unclear what is happening with the Number-3 reactor, which is fueled by a mix of uranium and plutonium.

现在还不清楚3号反应堆发生了什么情况，3号反应堆的燃料是混合的铀和钚。

youdao

The NPD insisted the use of Number 25 was pure chance and that the quality of the printing was unclear, meaning it could be another number.

BBC: German far-right leader on trial

How much of that run was inspired by short covering is unclear, as is the number of shares still sold short.

FORBES: Magazine Article

His total number of children is unclear, but according to the American Bucking Bull Inc.

WSJ: Those Who Root for the Bull