That said, it is ultimately quite tough and carries with it two types of risk.

这意味着，这终究是件棘手事，两种风险并存。

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Then we will use martingale approach to discuss the ruin problem of these two types of risk models.

并利用鞅的方法讨论了这类风险模型的破产问题。

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The authors concluded: "Overall, no increase in risk of glioma or meningioma [the two most common types of brain tumors] was observed with use of mobile phones."

作者得出的结论是：“总体来说，使用手机的人中神经胶质瘤和脑膜瘤(脑瘤中最常见的两种)发生的几率没有增加。”

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"While our study shows that this might not be sufficient to maintain normal weight, it clearly is sufficient to reduce the risk of developing many chronic diseases, including heart disease, certain types of cancer, type two diabetes."

VOA: standard.2010.03.30

Two sorts of issuer, each associated with different types of risk, dominate.

ECONOMIST: Japanese bonds

By suppressing ovulation, it actually reduces the risk of two types of cancer: ovarian, which affects the ovaries and endometrial, which affects the lining of the uterus.

CNN: Health - Look what's 40 -- the pill