Notre-Dame Cathedral is a very famous（著名的） church in the center of Paris, France. It was built on a small island called Île de la Cité, which is surrounded（被环绕） by the Seine River. Many people from all over the world come to visit（参观） this beautiful place. This church is very old（古老的）. The building started in the year 1163 and was finished in 1345. That means it took more than 180 years to complete! People at that time worked very hard and used big stones to build it, one by one. The church is very beautiful（漂亮的）. It has two tall towers and...

Coca-Cola is a sweet (甜的), fizzy (有汽的) drink. People all over the world know it. It is also called “Coke.” It comes in red cans (罐头) and bottles (瓶子). You can find it in stores, restaurants, and homes. Coca-Cola started in the year 1886 in the United States. A man named Dr. John Pemberton made the first Coca-Cola. At first, he sold it in a small pharmacy (药店). He mixed it with soda water (苏打水). People liked the taste (味道). It was new and exciting (令人兴奋的). Later, a man named Asa Candler helped more people learn about Coca-Cola. He made...

The 17 equations that changed the course of history