One day，a teacher took¹ his pupils to a chicken farm to pay² a visit. When they came³ near the incubator，a chick just got⁴ out of it’s eggshell.

老师带学生到养鸡场参观，当他们走近孵化器时，刚好一只小鸡破壳而出。

"It's wonderful to see a little thing come out from the eggshell，isn't it's it?”the teacher said⁵.

“看见一个小生命从蛋壳里出来，很奇妙，是不是?”老师说。

"Yes，sir，"said one of the boys，“But it would⁶ be more wonderful if we knew that how a chick gets into its eggshell beforehand⁷.”

“是的，老师，”一个男学生说，“可是，如果我们知道它是怎样事先钻进蛋壳里的那就更奇妙了。”