New words：

organ [ˈɔrɡən] n. 机关；风琴；管风琴；（人体或动植物的）器官

Sample Sentences：

There are many organs in a man's body.
The largest organ in the body is the liver.
He taught the piano, organ and composition.
The government set up a special organ to help poor families.

liver[ˈlɪvər] n. 肝

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