1、After waiting for hours, the customer finally let out a loud "harumph" to express his frustration.
在等待了几个小时后，这位顾客终于发出了一声大声的“哼”来表达他的不满。
2、Upon hearing the news of the cancelled event, she let out a disappointed "harumph" and walked away.
听到活动取消的消息后，她发出了失望的“哼”声，然后离开了。