hum and hah的用法和樣例：
例句
- He just hummed and hahed, and finally refused to commit himself.
他只是嗯嗯呃呃，最後還是拒絕表態。 - He hummed and hawed but finally told me the truth.
他先是支支吾吾，可最後還是跟我說了實話。 - Speak in a faltering and stammering manner.
說話支支吾吾，結結巴巴。 - Don't stand humming and hawing, but speak out.
有話痛痛快快說出來，不要吞吞吐吐的。 - The thief made a confession in bits and pieces.
竊賊吞吞吐吐作了招供。
