Of course you can understand these things.

How can you not understand it?

The atmosphere is the air that surrounds the outer layers of the earth.

Power is the amount of work done by an object in a unit of time.

A distance is a distance of length over a certain space.

Wavelength......

Zhao Qing continued to flip through the book, carefully reading the tea time, and at the same time silently paying attention to this Senior Sister Zhang.

The dark purple night light shines, and the light pollutes the inside of the chassis

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