Aunt Molly is a nag about regular meals.
莫莉姨妈是个对一日三餐絮絮叨叨的人。
The more Sarah nagged her, the more stubborn Cissie became.
萨拉越是对她唠叨不休,茜茜就越是固执。
If something such as a doubt or worry nags at you, or nags you, it keeps worrying you.
烦扰He could be wrong about her. The feeling nagged at him. 他可能错怪她了。这种感觉烦扰着他。