noun 下载 🔗分享 PDF,便携式文档格式。 Portable Document Format Examples : "Please find the instructions for the assignment attached as a PDF. " 请查看附件中作为 PDF 格式的作业说明。 (Qǐng chákàn fùjiàn zhōng zuòwéi PDF, biànxiéshì wéndàng géshì de zuòyè shuōmíng.) technology computing internet technical communication 与AI对话词汇游戏阅读练习
noun 下载 🔗分享 概率密度函数, 概率分布函数 Any function whose integral over a set gives the probability that a random variable has a value in that set Examples : "The teacher used the pdf of test scores to see how likely students were to get a passing grade. " 老师使用了考试成绩的概率密度函数,来了解学生获得及格分数的可能性有多大。 math statistics 与AI对话词汇游戏阅读练习