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Science Facts · 在此之前 3 缩略语.

Baby finger bones look like they aren't connected to their wrist on X-rays!In reality, they are held together by invisible, flexible cartilage that doesn't fully turn into solid bone until they are teenagers.Science and facts💡

Baby finger bones look like they aren't connected to their wrist on X-rays!In reality, they are held together by invisible, flexible cartilage that doesn't fully turn into solid bone until they are teenagers.Science and facts💡
Baby finger bones look like they aren't connected to their wrist on X-rays!In reality, they are held together by invisible, flexible cartilage that doesn't fully turn into solid bone until they are teenagers.Science and facts💡

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