Positioning: Tilting your head back straightens out the line to your stomach.
定位：头向后倾让喉咙到胃的通道变直。
2
Tilt: Back from face; tilting it over face will make the face appear shorter.
戴帽子的倾斜度：尽量往后，离你的脸距离远会让你的脸看上去短一点。
3
First, make sure the driver's seat is at a 90-degree angle-not tipped back-to prevent your head from tilting forward, and that both you and your passenger have plenty of legroom.