1·Some girls are under the big tree.
一些女孩在大树下。
2·Have a picnic under a big tree.
在大树下野餐;
3·I will be a big tree.
我要成为大树。
4·Big tree is good for enjoying the cool.
大树底下好乘凉。
5·One day it'll be a big tree!
有一天,它会生长成一棵大树。