重点讲解：
1. rear view mirror
后视镜；
eg. A driver can see the road behind him by looking at the rear view mirror.
汽车司机通过反光镜能看到他身后的路。
eg. The consumer is a rear view mirror, not a guide to the future.
消费者是后视镜，而不是对未来的指南。
eg. Look at life through the wind-shield, not the rear-view mirror.
透过档风玻璃迈向人生，不要由后视镜反观人生。
2. be right back
口语常用，表示马上回来；
eg. Think about it for a moment; I'll be right back."
你考虑一下，我一会儿就回来。”
eg. "All right, now. Hurry right back."
“那好吧，快去快回。”
eg. No matter how bad your heart has been broken the world doesn't stop for your grief. The sun comes right back up the next day.
不管你有多痛苦，这个世界都不会为你停止转动。太阳依旧照样升起。