New Words：

lung [lʌŋ] n. 肺
cancer ['kænsə] n. 癌；肿瘤；毒瘤

Sample Sentences：

The cancer has spread to his stomach.
Does smoking contribute to lung cancer?
Is there a connection between smoking and lung cancer?

contribution [.kɔntri'bju:ʃən] n. 贡献；捐款；捐赠
connection [kə'nekʃən] n. 连接；关联；联结；接通

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