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本集核心英语单词及例句：
1.pedestrian (n.)立交桥，天桥，高架路
The city built a pedestrian overpass over the highway.
城里在公路上建了一座过街天桥。
2.track (n.)小路；踪迹；轨道
It is our responsibility to put them on the right track.
我们有责任帮助他们走上正道.
3.schedule (n.)时刻表，进度表
I have a hectic schedule for the next few days.
我今后几天的日程紧得要命。
4.chaotic (adj.)混纯的；一片混乱的
My own house feels as filthy and chaotic as a bus terminal.
我自家的房子感觉又脏又乱，活像公共汽车终点站。
5.mess (v.)弄脏；搞砸
She messed up her new dress with blue ink.
蓝墨水弄脏了她的新衣服。
