Learn about the life and achievements of Bill Gates, from his childhood to co-founding Microsoft and becoming a philanthropic leader.

The U-44 was a German U-boat that served in World War I, part of the U-43 class of submarines.

记录了夕阳下田园风光的美丽景象，晚霞、金黄色的小草和摇曳的狗尾草，伴随着晚风，展现了一片宁静而美丽的乡村景色。

Footage of busy city streets on a rainy day, with people rushing to their destinations under colorful umbrellas.

A scene from the 1990 comedy film 'Kindergarten Cop' where Arnold Schwarzenegger's character punches a pig.

Get a thrilling first-person view of a roller coaster ride, with sharp turns, steep drops, and high speeds.

习惯可以改变一个人，好的习惯让我们变得更好，坏的习惯让我们不由自主。如何养成好的习惯，改变自己？