Rock-climbers are hazarding their lives.

攀岩的人用生命去冒险。

But both authors wrote books on the subject without hazarding a guess at a usable definition.

但两位作者都起了这个书名又都不肯冒险给出个有用的定义。

One of the most formidable enemies hazarding human health is tumour, the incidence of which rises sharply year after year.

肿瘤是人类健康大敌，其发病率也在逐年上升。

My master glanced towards the passage, and signed me to fetch the men: he had no intention of hazarding a personal encounter.

我的主人向过道望了一眼，暗示我叫人来——他可没有冒险作单打的企图。

Only then will the existing housing stock get the attention it deserves, he said, hazarding a guess that moment is five years hence.

只有这样，现有的存量住宅才能得到应有的关注，他猜测，这样的时刻会在五年之后到来。