任意行动

act however one likes

任意挥霍

spend wantonly

任意摆布

order around however one pleases

任意发泄怒气

vent one's rage

任意作出决定

make arbitrary decisions

任意胡来

do whatever one wants

任意妄为

act arrogantly and wilfully

任意挑选

pick arbitrarily

可以任意畅谈

can talk to one's heart's content

任意三角形

arbitrary triangle