expressions in use
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1. fired off
2. keep up with
3. set up
4. account for
5. stand out
6. add to
7. take the lead
8. at a disadvantage
9. in large part
10. visit with
structured writing
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it is not uncommon to see teenagers smoking today. some of them smoke because of peer pressure. when they see some of their friends smoking, they feel the pressure to try it out in order to “fit in” with the crowd. some other teenagers smoke because they want to imitate adults or appear to be mature. teenagers like to imitate their favorite stars and adults around them. so, parents who smoke may set a bad example for their children. in conclusion, the causes of teenager smoking can be attributed to peer pressure and their intention to look like adults.
translation
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伦敦地铁是英国的一个快速交通运输系统，服务于大伦敦的大部分地区。地铁系统因其他地铁隧道的典型形状也被称为地下管道。伦敦地铁始建于19世纪中期，是世界上最早的地下铁路系统。它的第一段地铁于1863年开始运营。自此，伦敦地铁不断延伸，发展成为一个包括12条线路、275个车站、铁轨总长超过250英里的地铁杰作，其中有45%在地下运行。就路线长度而言，它是世界上第四大地铁系统，也是车站数量最多的地铁系统之一。作为一个走遍伦敦的经济便捷的途径，伦敦地铁一向是每天数百万通勤者以及在节假日游历伦敦的游客的首选。伦敦地铁已成为伦敦的一个国际标志。2013年伦敦举办了各种各样的活动，庆祝地铁运营150周年，纪念这一里程碑。
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