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As a major in(学科)，borm in(年份)，I am very interested in(与职位相关的领域或职位本身).The most important qualification I have，I think，is my ability to(do sth.).It is beyond doubt that the ability to(do sth.)plays an indispensable role in doing the job of(职位).In the second place，I have been accumulating experience by(doing sth.与职位相关的事情)，which is，directly or indirectly，helpful to doing the job you required well.I am very confident that，by working hard and learning under your guidance，I can be competent for the post.