d'中文什么意思

短语和例子
〔口语〕
1.＝ do: How d'you ... ＝ How do you ...
2.＝ did.

• 'd:     〔口语〕 1.＝ had ...
• a and d:    入院和出院
• a d:    disk]重折光盘; 放弃的; 是一 ...

百科释义

The sensitivity index or d (pronounced 'dee-prime') is a statistic used in signal detection theory. It provides the separation between the means of the signal and the noise distributions, in units of the standard deviation of the noise distribution.