inventor可数吗

　　例句：

　　It was named after its inventor.

　　它以它的发明者命名。

　　Later he became a great inventor.

　　后来他成了一名伟大的发明家。

　　He decided to become an inventor.

　　他决心要成为一个发明家。

　　Its inventor died in World War I.

　　它的发明者早在一战时就已辞世。