The scientists extracted a cell nucleus from an organ of a dead mouse and planted it into the egg of another mouse which was alive, leading to the birth of the cloned mouse.

科学家们从死鼠的器官中提取细胞核，移入到另一只活鼠的卵细胞中，最终克隆出了小鼠。

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University students are nucleus and leading power in the future society, so their attitudes and behaviors to environmental problems will have a great effect on both environment and the whole society.

大学生是未来社会的中坚和领导力量，他们对环境问题的态度和行为将对环境乃至整个社会产生重要影响。

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Conclusion the increased expression of MMP-13 in pulpy nucleus indicates that MMP-13 may be one of the important factors leading to intervertebral disc degeneration.

结论髓核中MMP - 13的表达增强可能是腰椎间盘退变的重要因素之一。

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