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

A unique illustration of a grey alien wearing a traditional cowboy hat from the 1800s, blending science fiction and western themes.

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？

Russian President Vladimir Putin is seen dancing at a public event, showcasing a rare lighthearted moment.

Russian President Vladimir Putin presses a symbolic red button, likely initiating a strategic operation or ceremony.

Ariana Grande makes a stylish appearance on the blue carpet, waving to fans and posing for photos.

German Chancellor Angela Merkel is seen eating spaghetti, a rare glimpse into her personal life.