人类花了三年时间才确认引起艾滋病的病毒——人体免疫缺乏症病毒，而解决是否将这一发现公诸于世的争议则花了更长的时间。
It took three years to conclusively identify H. I. V., the virus that causes AIDS, and longer to settle disputed claims for the discovery.
人类花了三年时间才确认引起艾滋病的病毒——人体免疫缺乏症病毒，而解决是否将这一发现公诸于世的争议则花了更长的时间。
It took three years to conclusively identify H. I. V., the virus that causes AIDS, and longer to settle disputed claims for the discovery.
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