单词	be in default
释义	be in default 不履笔
随便看	frequency of pump frequency of purchase frequency of quotation Frequency of Radio frequency of receipt and payment of bank notes frequency of recirculation frequency of recombination frequency of reference frequency of resonance frequency of respiration frequency of ripple frequency of roll frequency of rotation frequency of sample frequency of sample means frequency of urinatior frequency of urine frequency of usage frequency of sampling frequency of sea echo frequency of semen collection frequency of sex chromatia cells Frequency of sexual intercourse frequency of ship motion frequency of signal