A short video showcasing various loading animations and their role in user interface design.

Learn about the fundamental principles of electric circuits, including voltage, current, resistance, and common components like wires, batteries, and switches.

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

A Chinese song performance with a nostalgic and longing tone, evoking a sense of adventure and exploration.

Learn about the guitarra, a stringed musical instrument originating from Spain, its history, types, and playing techniques.

警方调查年轻CEO李宇峰的死亡案件，发现尸体上的小刺痕和毒草残留物，揭开了一场复杂的谋杀案的序幕。

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