Christmas is a widely observed cultural holiday, celebrated on December 25 by millions of people around the world. It commemorates (纪念) the birth of Jesus Christ. The festival dated from as early as 336 AD. Gradually it evolved into a religious as well as secular (非宗教的) celebration, celebrated by an increasing number of non-Christians. Today Christmas is observed as an important festival and public holiday around the world. Christmas customs differ in different countries. Popular modern customs of the holiday include an exchange of Christmas cards and gifts, Christmas singing, church attendance, the display of various Christmas decorations and trees, family gatherings, and a special meal preparation. To small children, the festival is full of fantasy and surprise. Legend (传说) has it that Santa Claus will enter each house through the chimney and bring gifts to well-behaved children on Christmas Eve. Because gift-giving and many other aspects of the Christmas festival heighten economic activity among both Christians and non-Christians, the holiday has also become a significant event and a key sales period for businesses.
翻译：
圣诞节是一个被广泛庆祝的文化节日，全世界有许许多多的人在1 2月2 5日庆祝这一节日。它是为了纪念耶稣基督的诞辰。该节日最早可追溯到公元3 3 6年。渐渐地，这一节日演变为一个既是宗教又是非宗教的节日，越来越多的非基督徒也庆祝圣诞节。如今，圣诞节在全球被作为一个重大的节日和公共假日来庆祝。不同国家的圣诞节风俗也各不相同。现代流行的圣诞节风俗包括交换圣诞贺卡和圣诞礼物、唱圣诞歌曲、参加教堂活动、摆放各种圣诞装饰品和圣诞树、举行家庭聚会以及准备一顿特别的大餐。对小孩子们来说，这个节日充满了幻想和惊喜。据传说，圣诞老人会在圣诞夜从烟囱进入每户人家，给乖巧听话的孩子带来礼物。由于圣诞节送礼物以及许多其他方面推动了基督徒和非基督徒的经济活动，圣诞节也因此成为商家的一个重大活动和主要销售季。
原文：
每 年 农 历（Chinese lunar calendar）八 月 十 五 是我 国 的 传 统 节 日 —— 中 秋 节（the Mid-Autumn Festival）。这时是一年秋季的中期，所以被称为中秋。中秋节的一项重要活动是赏月。夜晚，人们赏明月、吃月饼，共庆中秋佳节。中秋节也是家庭团圆的时刻，远在他乡的游子，会借此寄托自己对故乡和亲人的思念之情。中秋节的习俗很多，都寄托着人们对美好生活的热爱和向往。自2008年起，中秋节成为中国的法定节假日
翻译： According to the Chinese lunar calendar, August 15 of every year is a traditional Chinese festival — the Mid-Autumn Festival. This day is the middle of autumn, so it is called Mid-Autumn. One of the important Mid-Autumn Festival activities is to enjoy the moon. On that night, people gather together to celebrate the Mid-Autumn Festival, looking up at the bright moon and eating moon cakes. The festival is also a time for family reunion. People living far away from home will express their feelings of missing their hometowns and families at this festival. There are many customs to celebrate the festival, all expressing people's love and hope for a happy life. Since 2008, the Mid-Autumn Festival has become an official national holiday in China.
Unit 3
原文：
he London Underground is a rapid transit (交通运输系统) system in the United Kingdom, serving a large part of Greater London. The underground system is also known as the Tube, due to the characteristic shape of the subway tunnels. It all started in the mid-1800s. The Tube was