Air travelers can enjoy stress-free trips if they follow a few guidelines.如果按照一些指引去做的话，飞机乘客在旅途中就不会紧张。No working environment is entirely stress-free.没有哪个工作环境是完全不存在压力的。Air travelers can have stress-free trips if they follow a few simple guidelines.飞机的乘客如能遵照一些简单易行的指示做，就可享受到轻松的旅途了。