Imagine having the opportunity to sing together with hundreds of other people while you are at home alone. You can do this in a virtual choir. Virtual choir members record themselves while they perform alone on video. These videos are uploaded onto the Internet, and then put together into one video that you can see online — a virtual choir. Anyone can take part in a virtual choir from anywhere — all you need is a video camera and an Internet connection. You do not even need a studio. A virtual choir helps connect ordinary people together. Many people do not have close friends or contacts who share their interest in music, and they never get the chance to sing together with others. A virtual choir enables them to add their voices to those of other individuals and become part of the global community. It has proved to be a positive influence on the lives of many people. As one virtual choir member said, "Music helps me to ... forget my problems. With music, I become another person."
The virtual choir was the idea of award-winning composer and conductor Eric Whitacre. Born in the USA on 2 January 1970, Whitacre began studying music at the University of Nevada in 1988. He fell in love with Mozart's classical music when he sang for the university choir. Moved by this music, he said, "It was like seeing color for the first time." He graduated from university in 1995, and then received a master's degree in musical composition from the Juilliard School in New York in 1997. Over the next 10 years, Whitacre's original compositions began to become quite popular among choirs and singers. This led to the creation of the virtual choir.
Whitacre's first virtual choir, "Lux Aurumque", had 185 singers from 12 different countries. It received millions of views on the Internet. Since then, the virtual choir has become a worldwide phenomenon. Whitacre's next effort was the Virtual Youth Choir for UNICEF, which featured 2,292 young people from 80 countries. Whitacre formed the Virtual Youth Choir for UNICEF, and it was seen in a live performance in the UK. In 2014, he formed the biggest virtual choir ever — "Fly to Paradise" — with 5,905 singers from 101 countries.
惠塔克的第一个虚拟合唱团"Lux Aurumque"（金色之光），有来自12个不同国家的185名歌手。它在互联网上获得了数百万的观看量。从那时起，虚拟合唱团已成为一种全球现象。惠塔克的下一个作品是为联合国儿童基金会成立的虚拟青年合唱团，特色是来自80个国家的2,292名年轻人。惠塔克为联合国儿童基金会组建了虚拟青年合唱团，该合唱团在英国的一场现场演出中亮相。2014年，他组建了有史以来最大的虚拟合唱团——"Fly to Paradise"（飞向天堂），有来自101个国家的5,905名歌手。
Since then 现在完成时标志词
Since then, the virtual choir has become a worldwide phenomenon 中 Since then 是现在完成时的标志词，表示"从那时到现在"。
Since + 时间点 / 过去动作 → 主句用现在完成时。Since 2015, he has written three books. 自2015年以来，他写了三本书。
which featured... 非限制性定语从句
the Virtual Youth Choir for UNICEF, which featured 2,292 young people from 80 countries 中 which 引导非限制性定语从句修饰 the Virtual Youth Choir for UNICEF，补充说明其参与人数和来源国。
feature vt. = 以……为特色 / 由……主演。此处 featured = had as a special feature。
The virtual choir is a wonderful way for people around the world to sing with one voice and thus make the world a better place.
虚拟合唱团是让世界各地的人们用同一个声音唱歌，从而使世界变得更美好的一种绝妙方式。
for people around the world to sing 不定式复合结构
a wonderful way for people around the world to sing with one voice 中 for people to sing 是不定式复合结构作定语修饰 a way。
for sb to do sth 不定式复合结构中 for 引出不定式的逻辑主语 people，不定式 to sing 与 way 构成名词+不定式搭配（way to do = 做……的方式）。
thus make... 结果副词
thus make the world a better place 中 thus 是副词表示"因此；从而"，连接前后两个不定式 to sing...and thus make...，表明因果关系。
thus = therefore / in this way，常用于正式文体。与 so 相比，thus 更正式。