A person enters from the left, walks, sits in a box, and undergoes a transformation from sadness to happiness before exiting to the right.

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 close-up view of a glass flask containing a herbal extract, showcasing its color and texture.

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

Learn about Mars, the 4th planet from the Sun, its reddish appearance, and its size and distance from the Sun, with a diameter of 6,792 km and an average distance of 225 million km.

A young female teacher explains and demonstrates how to define variables in JavaScript, covering the basics of variable declaration and usage.

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