You don't have to do anything—just lieback and enjoy the ride.
你什么事也不必做—只管悠闲享受乘车旅行的乐趣好啦。
《牛津词典》
2
You might just lieback and let the scent of lavender and the sound of falling water quiet your anxiety while a licensed massage therapist eases the crick in your neck.
你可以躺下，让薰衣草的香味和落水的声音缓解你的焦虑，同时让有执照的按摩治疗师缓解你脖子上的痉挛。
3
I lieback on the bed, silent as a clam. He goes on shaving.