arbitrary quantity

例句：

1. 1. He decided to go to the beach on a whim, which was completely arbitrary.
   他心血来潮决定去海滩，这完全是武断的。
2. 2. The decision was made by an arbitrary committee.
   这个决定是由一个武断的委员会做出的。
3. 3.She is known for her arbitrary decisions and lack of consideration.
   她以她武断的决定和不考虑他人感受而闻名。