dy [dai]以下由轻松背单词网站提供
单词级别附加级基本释义n. 元素镝(dysprosium)的符号 abbr. 配送(=delivery) abbr. 职责(=duty)参考例句This definition of dy presumes some expression for the subtangent. dy的这个定义假定次切线的一些表达式。The infinitely small "dx" and "dy" were sometimes described as vanishing or incipient quantities. 有时候把无穷小量dx和dy描述成正在消失的或者刚出现的量。 推荐阅读 |