I am an optimist. It does not seem too much use being anything else.

　　我是乐观者，做他种人似乎没什么太大作用。

　　external adj.

　　[ɪkˈstɜːrnl]

　　happening or arising or located outside or beyond some limits or especially surface

　　外部的;外面的

　　例句：

　　The external door was wide open but the inner one was locked.

　　外面的门大开着，而里面的门锁着。