白天黑夜、植物生长和沉浮

The sun is up.

太阳升起来了。

It is day now.

现在是白天。

We can play outside.

我们可以到外面玩。

The sun goes down.

太阳落山了。

The moon is up.

月亮升起来了。

It is night now.

现在是夜里了。

The sky is dark.

天黑了。

We sleep at night.

我们夜里睡觉。

I wake up in the morning.

我早上醒来。

The sun comes up again.

太阳又升起来了。

Is it day or night?

现在是白天还是夜里？

It's day, not night!

是白天，不是夜里！

When do we sleep?

我们什么时候睡觉？

At night, when it's dark.

夜里天黑的时候。