英语翻译众所周知,中国人乐于发明并善于运用发明简化生活.在中国古代的发明中,四大发明不仅为中国,还为世界的经济和文化的发

As everyone knows,Chinese to invention and good at using the invention to simplify your life.In Chinese invented in ancient times four big inventions in,not only for China,made a great contribution for the development of the world economy and culture.The four great inventions are papermaking,printing,gunpowder and the guide sign.