This means they are active at night.

这是指它们在晚上很活跃。

Most scorpions are active only at night.

多数蝎子只在晚间活动。

Our limbs are active and strong, you know.

那时候你才清楚，我们腿脚的活力。

We are active on the patience.

我们将耐心观察局势发展。

Sentences like this are active voice.

像这样的句子是主动语态。

But they also are active in other school activities.

也可参加其他的学校活动。

During REM sleep, those same parts of the brain are active.

在快速眼动睡眠期间，大脑中同样的部分是活跃的。

About 50 million Americans are active in what is called “fitness” walking.

大约5千万名美国人很热衷这种“健康”的健身方式。

I think everyone here and beyond, we are active participants in this decision.

我认为在座的各位和其他各位，我们都是这一决定的积极参与者。

Now, people who are active do not let grass grow under their feet.

现在，积极的人不会错过机会（let grass grow under one's feet）。

In the bilingual brain, all our languages are active, all at the same time.

在双语大脑中，我们所有的语言都在同时活跃着。

Most birds are active in the daytime, so you can easily watch them there.

大多数鸟在白天都很活跃，因此你可以轻而易举观察到它们。

Genes that help birds detect salty and sour tastes are active in penguins.

帮助鸟类感知咸味和酸味的基因在企鹅身上很活跃。

We've had 'night owls', people who stay up late and are active at night.

我们已经学了“夜猫子”，他们熬夜到很晚，晚上还很活跃。

Our brains are active, and our eyes have fast short movements, as if watching something.

我们的大脑很活跃，眼睛在快速运动好像在看什么东西。

Great, well, that's great news that IDP are active in Syria and IELTS is back.

很好，这是个好消息，IDP 在叙利亚又运行起来了，雅思回归了。

Students attend classes and study at school. But they also are active in other school activities.

学生们在学校上课学习，也可参加其他的学校活动。

And they're saying that by far the most effective techniques are active recall and spaced repetition.

他们说到目前为止最有效的方法是主动回忆和间隔重复。

Now with our enhanced understanding, let's pose the question: are active cooldowns at all necessary?

现在我们对于冷身有了更多的了解，那现在要如何看待主动冷身是否有必要？

Small chemical entities called methyl groups attach to stretches of DNA, which affects what sequences are active.

被称为“甲基原子团”的小化学实体附着在DNA片段上，这会对哪些序列是活跃的产生影响。