他的感冒已经发展成严重的肺炎了。
His cold has turned into a ___full-blown pneumonia.
他的过敏症状已经发展到了全面发作的阶段。
His allergy has developed into a ___full-blown reaction now.
最初只是个轻微感冒，现在已经发展成严重的流感了。
It started as a mild cold but has now become a ___full-blown flu.
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