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.

到幼体期，重新开始生命周期。

With a lifespan of 30 years, their peculiar traits have evolved over millions of years to make them uniquely suited to survive harsh conditions, especially long periods without oxygen.

在 30 年的生命周期中，它特别的特征在长达百万年的时间中不断进化，使得他以独特的方式适应恶劣的环境，特别是长期缺氧的环境。

So, in 2019, I was first contacted by the Nature Conservancy in California because they were interested in whether it would be possible to breed sunflower stars through their life cycle.

在2019年，加利福尼亚州的自然保护协会第一次联系到我，因为他对向日葵海星是否有可能在其个生命周期中繁殖感兴趣。

Another influence is that concerns about the environment will force manufacturers to extend product lifecycles, to reduce the amount of pollution and waste.

另一个影响就是人对于环境的关注将会使制造商不得不延长产品的生命周期，减少污染和浪费。

The point is the manufacturer retains responsibility for the lifecycle of the product it produces, rather than the consumer assuming that responsibility when he or she buys it.

问题的关键是，制造商要对其所产产品的生命周期负责，而不是消费者在购买产品时承担责任。

To confirm their theory, the scientists model the life cycle of stars in LMC over the past couple of billion years and revealed the effects of the birth of hypervelocity stars.

为了证实他的理论，科模拟了 LMC 中恒星在过去几十亿年间的生命周期，并揭示了超速恒星诞生的影响。

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，进化可能会择更快的生命周期。

It has clearly taken a beating in its lifetime.

在它的生命周期里，明显地遭受了打击。

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

D）研究酶的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里开始？

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

和蝴蝶一样，水母在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.

在 2018 年的一项研究中，科假设文明甚至能以化石燃料来驱动生命周期。

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

它的茎在生命周期中死亡又重生，基本上使它不朽。

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

在它生命周期的这个特定时期，这段时间是相当关键的。

But Maria explained and painted their life cycle.

但玛丽亚做出了阐释并绘制了它的生命周期。

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

这些元素在恒星生命周期结束时爆炸进入太空。

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

它怪异的生命周期吸引了全国各地记者的注意力。

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

在花园里，生可以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。