The uploaded data may be useless without this meta information.

没有这个元信息，上载的数据可能会无效。

youdao

I know that may be useless, but that's the only thing I can do for myself.

我知道这根本没什么用处，但这已经是我唯一能给自己做的事了。

youdao

But I find it is a very hard job, because if you give it up one day, all effort you have done in many days before may be useless.

但是，我发现它是一个非常难的事情，因为如果你有一天放弃了，意味前面好多天所做的努力都白费了。

youdao

Other types of data, such as sensor output, may be useless drivel to prying eyes.

FORBES: For Cloud Security, Mix It Up With Both Off and On-Premises Systems

Simply put, what is a perfect machine in terms of engineering specs may be useless, if customers happen to think so.

FORBES: One Question Every High Technology CEO Should Ask Every Day

If a skier is pushed off a cliff, gets stuck in a divot or suffers trauma from hitting rocks or trees, an airbag deployment may be useless.

BBC: The ski gear that could save lives