...意义源自收集以下是十年前读本科时就应该清晰的基本概念,内疚的是,直至如今在实际应用中才得以学习自由度(degree of freedom, df)是指在数学中能够自由取值的变量个数如有三个变量x ..
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ABBREVIATION for Defender of the Faith 保教功臣
Districts reporting DF/DHF cases are Baucau, Dili, Ermera, Liquica, Maliana, Manatuto and Viqueque, with 76% of the cases reported from Dili ( see previous report).
报告登革热/登革出血热病例的县为包考、帝力、埃尔梅拉、利基萨、马利亚纳、马纳图托和维奎奎，其中帝力报告的病例占76%（见以前的报告）。
On 2 April 2008, the State of Rio de Janeiro reported 57 010 cases of dengue fever (DF) including 67 confirmed deaths and 58 deaths currently under investigation.
2008年4月2日，里约热内卢州报告登革热病例57 010例，包括67例登革热确诊死亡，另有58例死亡正在调查之中。
The hollow axle driving system of wheel sets of DF 11 locomotives is a new main component developed for speedup of domestic railway passenger traffic.
东风11型机车轮对空心轴驱动系统是为我国铁路客运提速开发研制的机车重大新部件。
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