If people look around, they can easily find pine trees. 如果人们四处看看，他们可以轻易地发现松树。

　　There are about 115 different kinds of pine trees all over the world. 世界上大约有115种不同的松树。

　　People use pine trees for many reasons. 人们使用松树的原因有很多。

　　In old times, people built houses with pine trees. 古时候，人们用松树建房子。

　　Now people use pine-leaf powder for healthy drinks. 现在，人们用松叶粉做健康饮品。

　　Also, dried pine trees are good for baseball bats. 干的松树也是做棒球棍的好材料。

　　What a useful tree it is!  多么有用的树啊！