Question

一句英语翻译

正是通过丝绸之路，中国的造纸，火药，指南针，印刷术四大发明才被引介到世界各地。

Answer 1

正是通过丝绸之路，中国的造纸，火药，指南针，印刷术四大发明才被引介到世界各地。
It is through the Silk Road, Chinese papermaking, gunpowder, the compass, the printing press was introduced to the four great inventions to world.

追问

1. 时态好像错了吧

2. was introduced to the four great inventions to world.
   是什么意思？