但是，两组光周期被打乱的老龄雄鼠的死亡率则高多了。

But the number of deaths in the two groups whose day-and-night cycles had been tampered with was far higher.

youdao

果不其然，三组内年轻雄鼠的状况相对良好——仅死亡一只。

As might be expected, the young mice in each of the three groups fared relatively well; just one died.

youdao

因此，自然存在的社群环境能影响幼年雄鼠的形态生理特征发育。

Thus a naturally occurring social environment can influence development of morpho-physiological characteristics of young males.

youdao