Evolutionarily speaking, people in this age group are at a stage in which they can prepare to find a mate and start their own family while separating from parents and striking out on their own.
从进化的角度来说，这个年龄段的人正处于这样一个阶段：他们可以在与父母分开、自谋生计的同时，为寻找伴侣和组建自己的家庭做准备。
At the age of around twenty nine, Saturn returns to its position at the time of birth, and this stage is seen as an important milestone in a person's life.
在大约二十九岁的时候，土星回归到出生时候的位置，这个阶段被视为是一个人生命中一个重要的里程碑。
By identifying what stage the insect is at, experts can estimate its age and relate this to how long the body has been dead.
通过识别昆虫所处的生命阶段，专家可以估计出它的年龄，并推断出尸体的死亡时间。
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