It's a pulsating star that swells and shrinks periodically.

它一颗脉动的恒星，周期性地膨胀和收缩。

Lemmings periodically commit mass suicide, and no one knows just why!

鼠会周期性地进行大规模自杀，但没人知道究竟为什么！

We'll be looking at various, innovative energy efforts periodically, starting with one underway in Scotland.

我们正在周期性地关注能源领域各种创新性的努力，从苏格兰正在进行的一个能源工作开始。

I remember the boats heaving periodically, on the huge gently rolling waves.

我记得船在波浪中周期性地起伏。

In the middle of the night, your body actually wakes up periodically, in something called microarousals.

在午夜，你的身体会周期性地醒来，这就所谓的微觉醒。

The electrons that move along an alternating current, on the other hand, periodically and consistently change direction.

另一方面，在交流电中移动的电子会周期性地、持续地改变方向。

UNIDENTIFIED MALE: That's something we've seen in very small numbers periodically over the years.

这我们多年来周期性地看到的一小部分现象。

Better to leave it on, and use something else to periodically block the light reliably and rapidly.

最好不要关灯，用别的东西周期性地可靠而迅速地阻挡光线。

Since then, North Korea has gone back, periodically, to using threats to get more money and food.

自那时以来，朝鲜经常周期性地利用威胁来换取更多金钱和食物。

Ebola is a highly infectious virus that has affected areas in Africa periodically over more than 40 years.

埃博拉一种高度传染性的，40多年来周期性地影响着非洲地区。

The best measure, they say, is the cyclically adjusted price-to-earnings ratio, or CAPE, developed by Yale economist Robert Shiller.

他们说，最好的衡量标准周期性地调整市盈率，即由耶鲁大学经济学家Robert Shiller提出的CAPE。

The grotesque grasshopper that relentlessly pulls time forward periodically winks at passersby.

怪诞的蚱蜢无情地把时间往前拉，周期性地向路人眨眼。

Scientists know that volcanic eruptions have periodically cooled the climate.

科学家们知道，火山喷发周期性地使气候变冷。

Well, they do come periodically, so this is not, you know, the first pandemic, right?

GB：好吧， 它们确实会周期性地出现， 所以这并不， 你知道的，第一次大流行，对吧？

As the star turned into a white dwarf, it periodically ejected mass.

当这颗恒星变成白矮星时，它会周期性地喷射物质。

Her sleep is terrible and she's periodically overcome by panic attacks.

她的睡眠很糟糕，而且她会周期性地出现恐慌发作。

After that, it periodically shows up on funerary goods belonging to the pharaohs.

此后，它会周期性地出现在法老的陪葬品中。

After fully charging, Siegeween will periodically fire slow-moving mini-stration bubbles toward her target, dealing Hydro Damage.

充满能量后， Siegeween会周期性地向目标发射移动缓慢的小型治疗泡泡，造成水元素伤害。

And so fire periodically comes along.

于火灾会周期性地发生。

And it'll get flooded periodically, but it's not constantly wet.

它会周期性地被洪水淹没，但并不始终处于湿润状态。