After six lessons, we finally derive the Laplacian operator in spherical coordinates!

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Immersive water-play experience! Let's explore the magical world beneath the water together!

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Do it ..do it..

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Mobile phone macro assists in pulling out the fine glass residue from the flesh

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CP29 is not fun at all on day2 baaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaat

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Life Hacks

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Classmate, don't doze off during the exam! (How can you even fall asleep?)

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The high-value cosplayer at Qingdao DC Comic Exhibition, being a two-dimensional character is really

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I was so excited to have a big meal on my first flight!

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When I heard the three words "ex-girlfriend" from my wife, I knew that I was dead!

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It's really scary!! Lesbians are especially scary!! Don't come here

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Hanser turns on the camera for a livestream to show off the gifts from the furry creatures (and will

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90 degrees is a right angle; 92 degrees is already a slope.

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