1、My elderly neighbor is quite cantankerous and always complains about everything.
我的年长邻居非常脾气暴躁，总是对一切都抱怨。
2、The cantankerous customer kept arguing with the cashier over a small mistake in his bill.
那个爱争吵的顾客因账单上的一个小错误与收银员争执不休。