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One of them wrote to us out of the blue several years later.數(shù)年后他們中的一人突然給我們寫了一封信。Her son, who left her more than thirty years ago, came out of the blue.她三十多年前離開的兒子出乎意料地回來了.The whole thing was a bolt out of the blue.這件事,整個...

out of the blue的音標：out of the blue的英式發(fā)音音標為：[aut ?v e? blu:]out of the blue的美式發(fā)音音標為：[a?t ?v ei blu]...

出其不意，出乎意料...