基本解釋忙時呼叫嘗試詞組短語短語million busy hour call attempt 百萬次忙時試呼bhca busy hour call attempt 忙時試呼Busy Hour Call Attempt BHCA 忙時試呼次數(shù)busy hour call attempt更多詞組專業(yè)釋義電子、通信與自動控制技術忙時呼叫嘗試