Even with preschoolers -- Richard Davidson did that in Madison.

甚至幼儿园的孩子也能发生这样的改变， 理查德? 戴维森在麦迪逊市做过实验。

In the U.S., obesity among low-income preschoolers has declined.

在美国，低收入学龄前儿童的肥胖数量减少。

Preschoolers are children around the age of 4 or 5.

学龄前儿童指四、五岁年龄的儿童。

55. What does the author say about preschoolers ages 2 to 5?

55. 作者对于 2 到 5 岁的学龄前儿童有什么说法？

And cost: the average cost for a state to educate a preschooler is five thousand dollars a year.

一个州教育一个学龄前儿童的平均成本是每年5000美元。

It's called UPSTART,and more than 60,000 preschoolers in the US have already used it.

它被称为UPSTART，美国已有超过60,000名学龄前儿童使用过它。

Today Khan academy has more than 100 million users worldwide from preschoolers to college students.

今天，可汗学院在全世界有超过1亿的用户，从学龄前儿童到大学生。

Most of the dead were preschoolers who were stabbed and shot as they napped on blankets on the floor.

大多数死者是学龄前儿童，他们在地板的毯子上午睡时被刺伤并受到枪击。

It looks as if childhood obesity rates have begun to decrease in many states among our nation's low-income preschoolers.

在美国很多州，低收入家庭学龄前儿童的肥胖率有所下降。

A researcher tells these preschoolers that she's going to leave the room.

一位研究人员告诉这些学龄前儿童她要离开房间。