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

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？

A regal black princess crown paired with a elegant black dress, perfect for formal occasions or costume wear.

Watch as the Caped Crusader trades in his grappling hook for a tennis racket in this fun and action-packed video.

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

Watch as a car appears to teleport to different locations around the city at night, its lights illuminating the dark streets.

President Joe Biden delivers remarks at the Right to Unite for a Livable Future event, discussing workers' rights and labor unions.