Ultraviolet does a great harm to cells as an external factor that causes cell division.

紫外线是一种外源性的促细胞分裂剂,对细胞有很大的损伤作用.

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External Factor Evaluation Matrix and Internal Evaluation Matrix are used while studying external and internal factors.

在研究公司内部和外部环境时,运用了外部因素评价和内部因素评价矩阵.

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