New Words：

contribution [.kɔntri'bju:ʃən] n. 贡献；捐款；捐赠
inexperience [.inik'spiəriəns] n.无经验；不熟练

Sample Sentences：

All contributions, however small, will be greatly appreciated.
He has made an important contribution to the company's success.
We laughed at her inexperience in the kitchen; she couldn't boil water.

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