1. The advertisements declare that active ingredients stimulate cells deep in the skin's layers to divide, so replacing old cells and effectively renewing the skin.
    广告声称那些活性因子能刺激皮肤深层的细胞分裂，以此来替换旧细胞，并有效地更新皮肤。

2. Caesar´s astronomers chose to divide the year into 12 months of about the same length.
    恺撒的天文学家们选择把一年平均分成了12个月份。

3. I divide the cake into four parts.
    我把蛋糕分成四份。

4. If normal cells can be stimulated to divide, then abnormal ones could also be prompted to multiply, so causing or accelerating skin cancer.
    如果正常的细胞可以受刺激而分裂，那么不正常的细胞也会加快繁殖，引起或加速皮肤癌的发生。

5. For discussion purposes, we can divide these payments into three broad categories.
    为方便讨论起见，我们可将这些支出分为三大类。