I am a very useless person.

我是个没本事的人。

youdao

I think I'm a very useless person, I always make my parents sad.

我觉得我是一个很没有用的人，我总是使我的父母伤心。

youdao

Women's tears is the most useless liquid, but you let the woman tears that you very useless.

女人的眼泪是最无用的液体，但你让女人流泪说明你很无用。

youdao

There is a very tall useless machine.

WSJ: Looking for Something Useful to Do With Your Time? Don't Try This

But those very viruses probably make these new embryonic stem cells useless as treatments.

FORBES: Regenerators

The Reapers will carry out a very limited range of missions, and be nearly useless against sophisticated adversaries unless operators are willing to incur high loss rates.

FORBES: The Revolution In Unmanned Aircraft Is Overrated