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

Take in the awe-inspiring scenery of a picturesque landscape with rolling hills, majestic mountains, and serene waters.

Watch as Neil Armstrong moves around on the lunar surface during the historic Apollo 11 mission in 1969.

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？

An educational video about the second letter of the alphabet, its pronunciation, and common words that start with B.

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

A young girl's joyful reaction as she chases a yellow balloon, capturing a sweet and carefree moment of childhood innocence.