The nineteen twenties also was one of the most active and important periods for the more serious arts.

20世纪20年代也是更加严肃的艺术形式最活跃的重要时期之一。

Sharks are fish, and fish do not sleep the way that we do, but they do have active and resting periods.

鲨鱼属于鱼类，鱼类的睡觉方式跟人类不一样，它们也有活动期和休眠期。

With this, the most active period of James’ efforts to reclaim his thrones came to an

至此，詹姆斯夺回王位最活跃的时期就到了。

And what goes on in your brain while you sleep is an intensely active period of restructuring, that's crucial for how our memory works.

你睡觉的时间正是你的大脑内部重新调整组合的时间，这个阶段对我们的记忆功能十分重要。

In fact, the correct answer was that being a toddler is the most active period of your whole life – which isn't hard to believe if you live with one!

事实上，正确的答案是，幼儿时期是你一生中最活跃的时期——如果你身边有幼儿，这并不难相信！