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有些大学生是根据自己的专业来选择志愿服务的,而不是碰到什么就做什么。(volunteer job; rather than)

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这位著名的科学家将在北京大学发表有关全球气候变化与公共政策的演讲。(lecture on; global climate change)

My dad was a man of few words, and never lectured me on the values of determination, perseverance, and faith. The pickle jar had taught me all these virtues far more eloquently than the most flowery of words could have done. (注意values和the most flowery of words的意思。)

经理已经做出保证,在他的任期结束之前,他不会离任. (pledge one's word;leave office; term)

某带宽B为1000毫米,带芯布层数n为5的胶带,采用斜接头胶接,斜边与中心线夹角α为60°,每个阶梯长L,为150毫米,求接头实际长度。

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