I am like a remnant of a cloud of autumn uselessly roaming in the sky.

我就像秋天里的一片残云，无助的漂流在天空中。

youdao

I am like a remnant of a cloud of autumn uselessly roaming in the sky.

我就像秋天里的一片残云，无助地飘拂在空中。

youdao

Although irrigation improved yield, crop under irrigation could not use the water of soil water reservoir. So irrigation made water waste uselessly and reduced WUE.

灌溉量的增加，虽然提高了产量，却导致土壤水库中的水分不能被作物充分利用，造成了水分的无效蒸散浪费，降低了水分利用效率。

youdao

The two M651 rounds ricocheted off the bunker and bounced uselessly into a field.

CNN: The return of Waco

"A large number of patients are being treated uselessly, " says Fernando Martinez, professor of pediatrics at the University of Arizona.

FORBES: Magazine Article

Most kites have a wrist leash that releases one side of the kite when the surfer lets go of the control bar, so the kite flaps uselessly like a flag instead of dragging the surfer underwater (it can happen).

FORBES: Hook In and Hold On