Using the principle of similar triangles to measure tree height

Primary Colors and Mixing

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For Canadian women, having a baby feels like catching a cold—men are the real disadvantaged group he

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The roof seems to be leaking.

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This is a bit outrageous.

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How do you calculate this?

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You could go perform magic now.

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Looks like we can save the money for buying speakers.

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Can you really pump water like this?

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Today, nothing seems to go right.

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Today, the secret of the dogtail grass was finally revealed.

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Everyone, please don't blindly follow trends and imitate others.

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How do these bubbles stay suspended?

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This is way too scary.

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PS tutorial | Master this creative bookmark poster technique—still struggling with how to design you

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This is how the old-fashioned hand pump well actually works.

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I spent ages trying to figure it out, but still couldn't understand.

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I never expected that the egg would actually jump!

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To not play by the rules.

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The so-called "energy stone" I bought on Taobao turned out to be just uranium glass. Though it's not

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JD.com's "National Favorite Car" fiasco happened way too fast—let's be extra cautious when buying ca

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