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A sperm cell develops from a sperm mother cell.
精细胞从精母细胞发育而成.
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How can an X chromosome be nearly as big as the head of the sperm cell?
染色体怎么会接近性子头部的大小?
The vaccine works by blocking male sperm cell from joining female egg cell.
疫苗阻断雄鼠精细胞同雌鼠卵细胞结合.
"a sperm is mostly a nucleus surrounded by little other cellular material"
精细胞???
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