Menstruation is really just a very normal body life cycle.

月经其实只是一个非常正常的身体生命周期。

The juvenile then starts the jellyfish's life cycle all over again.

回到幼体期，重新开始生命周期。

Life cycle is the series of changes something goes through from birth to death.

生命周期是事物从出生到死亡所经历的一系列变化。

When large mammals like grizzlies are hunted, evolution might select for speedier life cycles.

当灰熊这种大型哺乳动物被猎杀时，进化可能会选择更快的生命周期。

It has clearly taken a beating in its lifetime.

的生命周期，明显地遭受。

D) Studying the full life cycle of the enzyme as the first step.

D）研究酶的整个生命周期作为第一步。

Where do most plants start their life cycle?

大部分植物的生命周期大多从哪开始？

Like butterflies, Turritopsis morph through multiple stages during their life cycle.

和蝴蝶一样，水母生命周期的不同阶段有不同的变体。

In a 2018 study, scientists hypothesized that civilizations could even have fossil fuel-driven life cycles.

2018 年的一项研究中，科学家们假设文明甚至能以化石燃料来驱动生命周期。

So when it fails, just think that's just a part of its life cycle.

因此，当失败时，只需认为这只是其生命周期的一部分。

Their stems dying and reborn in a life cycle that renders them essentially immortal.

们的茎生命周期中死亡又重生，基本上使们不朽。

Like other jellyfish, T. dohrnii goes through a two-part life cycle.

和其他水母一样，灯塔水母的生命周期由两部分组成。

And that time is quite critical at this particular period of their life cycle.

们生命周期的这个特定时期，这段时间是相当关键的。

The latest data from Gaia sparked a discovery in a star's life cycle.

盖亚的最新数据引发恒星生命周期中的新发现。

But Maria explained and painted their life cycle.

但玛丽亚做出阐释并绘制们的生命周期。

These elements exploded into space at the end of the stars' life cycles.

这些元素恒星生命周期结束时爆炸进入太空。

But they have a much shorter life cycle and stay alive in two ways.

但们的生命周期更短，只有2种存活方式。

Their strange cycle has attracted the attention of journalists all over the country.

们怪异的生命周期吸引全国各地记者们的注意力。

In the garden, students can learn environmental ideas like plant lifecycles or ecosystems.

花园，学生们可以学习植物生命周期或生态系统等环境理念。

She's just coming over to study the life cycle of silkworms.

她只是过来跟我一起研究蚕的生命周期。