chair它是名詞，漢語意思就是椅子，chair [tʃeə]， teacher 它的發音就是['tiːtʃə]，這兩個英語單詞中的ch都發/tʃ/的音，類似的單詞還有很多Chinese，China，check，beach，watch，earch，match等都是發/tʃ/，例句：These are some teachers sitting on the chair.

Listen to the teacher.聽老師講解例句：Instead, we’re measuring their ability to learn, to sit in the chair and stare at the blackboard and listen to the teacher. 相反，我們衡量他們的學習能力，看他們的屁股能不能坐住板凳，能不能聚精會神地盯著黑板，聽老師講課。