你驱车驰骋在高速公路上,享受着日行千里的快感,然而前面却冒出一个收费站,你一下子被从云端拉回地面,不得不含恨减速。更郁闷的是,收费站除了耽误时间,还消耗掉更多燃油,排出更多废气…… You drove up the highway and enjoyed the thrill of traveling thousands of miles. However, a toll booth popped up in front of you. You were suddenly pulled back from the clouds to the ground and had to slow down. What is even more depressing is that apart from the delay time, the toll station consumes more fuel and discharges more exhaust gas ......