1·After having her expense claims overruled, she took the money from petty cash.
在她的费用申请被驳回后，她从小额备用金中取了钱。
—— 《柯林斯英汉双解大词典》
2·People like us must never seek petty advantages at the expense of justice and righteousness.
咱们这种人，万万不可以贪小利而忘大义。