Under the surface of traditional accounts of economic growth there is a rather crude model: economies are a bit like loaves of bread.

Is not she a sister's child? and could I bear to see her want while I had a bit of bread to give her?

只要我能给她一点面包吃，我怎么能忍心眼看着她挨饿呢？

One day the poor woman found that they did not have enough money to buy even a bit of bread for another day.

一天这个贫穷的女人发现他们已经身无分文，甚至连第二天买一块面包的钱的都没有。

Please bring me a piece of chalk.

请给我拿支粉笔.

Can you give me a piece of chalk?

你能给我一支粉笔 吗 ?

A piece of chalk.

一支粉笔.

The teacher wrote with a piece of chalk on the blackboard.

老师用粉笔在黑板上写字.

I stepped onto the platform and picked a piece of chalk.

我走上了讲台,拿起了一支粉笔.

It's a piece of chalk.

这是一枝粉笔.

Please bring him a piece of chalk.

请带一支粉笔给我.

Please give me a piece of chalk.

请给我一支粉笔.

The teacher wrote on the blackboard with a piece of chalk.

老师用一支粉笔在黑板上写字。

I come upon a group of children play in the street.

我遇到一群孩子在街上玩耍。

The teacher walked out of the classroom, followed by a group of children.

教师走出教室，后面跟着一群孩子。

When we get there, a group of children come to have a class.

当我们到达那里的时候，正好碰上一群孩子来上消防课。

On the side lawn a group of children sing and dance.

那边草地上有一群孩子在唱歌跳舞。

On my way home from work, I saw a group of children flying kites.

在下班回家的路上，我看见一群小孩在放风筝。

A group of children are singing.

一群孩子在唱歌。

A group of children were goading another child in the school playground.

一群孩子在学校的操场上嘲笑另一个孩子。

The picture shows a group of children enjoying themselves in a pool, with two of them splashing down a water slide.

图片展示的是一群孩子在一个游泳池中快乐地玩耍，其中两个孩子正从水滑梯上滑下来，溅起一片水花。

The Narnia stories tell of a group of children in this fantasy land.

纳尼亚传奇讲述了这片梦幻之地上一群孩子的故事。