This is an arbitrary decision.

这是个武断的决定。

youdao

Why 18?It's most likely an arbitrary decision, but why not 16, or 20?

这估计是个任意的决定，但为什么不选16个， 还是20个呢？

youdao

When he is confronted with a dilemma, he usually makes an arbitrary decision by throwing a coin.

当他进退两难时，总是采用抛硬币的方法来任意做出一个决定。

youdao

What we did not anticipate was an arbitrary decision to constrain consumer choice.

WSJ: Seth Goldman: Mayor Bloomberg and Our 16.9-Ounce Tea

The coroner says one challenge has been fixing a time of death for Katrina's victims, so he says he's made an arbitrary decision.

NPR: New Orleans Begins Probe into Katrina Deaths

We ranked the list's vehicles based on what it costs to fuel them per year, according to the EPA. We measured cars by fueling cost because the EPA lists two gas-mileage figures per car, city and highway mileage, and we did not want to make an arbitrary decision about which mileage figure is more important.

FORBES: Magazine Article