In a laboratory, Dr.Casals carefully isolated and analyzed the Lassa virus.But he too fell ill from his exposure to the disease.

 
  • 在一間實(shí)驗室里,卡爾薩斯醫生小心翼翼地隔離分析拉薩病毒,但因接觸這種疾病,他也生病了。
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