单词	勞苦患難
释义	英華☞先難後獲
随便看	frequency changer set frequency changer，fc frequency changer，frequency converter frequency change signaling frequency change signalling frequency-change signalling frequency channel frequency channel--fc frequency channel，fc frequency characteristic frequency characteristics frequency characteristics of load frequency chart frequency charts frequency chirp frequency chirping frequency-- circular frequency class frequency coding frequency coherence frequency collapse frequency-- collision frequency comparator frequency comparison frequency compensation