English is widely used throughout the world. So many people speak it as a second language. On line, you'll find lots of information in English. If you don't understand English,.. how can you know more about the world, how can you get more knowledge. At international conferences, English is also used as the official language. Without good English, you cannot express your ideas well at such conferences, neither can you introduceChina to the outside world.
注释:
1) a second language第二语言
2) get more knowledge获得更多的知识
3) the official language官方语言