Their expenditure created a virtuous economic cycle.

他们的开支创造了经济的良性循环。

The World's Health Organization calls it a vicious cycle.

世界卫生组织称其为恶性循环。

No humans even touch them. That can create these vicious cycles, these self-reinforcing cycles.

人不去碰。这就可能产生恶性循环，而且这些循环会自我愈演愈烈。

The Earth's movement creates a few cycles.

地球的运动包含很多圈。

And levels of melatonin, the hormone that helps regulate sleep cycles, dropped.

帮助调节睡眠周期的褪黑素也减少了。

The big avocado exporters are disrupting the water cycle.

大型鳄梨出口商正在破坏水循环。

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。

Your work cycle functions like your sleep cycle.

工作周期的功能就像睡眠周期一样。

This process of booms and busts is called the business cycle.

这种繁荣、萧条的过程被称为经济周期。

Jellyfish have a complex and interesting life cycle.

水母的生存期既复杂又有趣。

But Maria explained and painted their life cycle.

但玛丽亚做出了阐释并绘制了它们的生命周期。

Once established, such a culture will kick start a cycle of positivity.

一旦这种社会和文化得以建成，这种文化就会开启一种良性循环。

Her menstrual cycle stopped, and her sleep-wake cycle changed radically.

她在月经停止和无法分别白天与黑夜的情况下，佛理尼的身体原完全失序了。

And say with me. I am cycling. I am cycling. I am cycling. I am cycling.

和我一起说，我在骑自行车，我在骑自行车，我在骑自行车，我在骑自行车。

It's a vicious cycle, with seemingly no reprieve.

这是一个恶性循环，似乎没有喘息的机会。

Evel's riding the amazing stunt cycle.

Evel正在表演惊人的摩托车特技。

You might not believe it, but it's negatively affecting your sleep cycle.

你也许不信 但它对睡眠周期有负面影响。

The last stage or cycle in most washing machines is called the Spin Cycle.

大多数洗衣机的最后阶段称为旋转阶段。

That they disrupt our sleep cycles and cause a number of other health problems.

这会扰乱我们的睡眠周期，并导致其他一些健康问题。