最初几天，凯南总是对幼崽不在身边感到有些失望。
For the first few days, Kynan was always a bit disappointed that the cubs weren't there.
感染后最初几天可以从血液中分离出病毒。
The virus may be isolated from the blood during the first few days of infection.
生命最初几天对于新生儿的存活最为重要。
The first days of life are the most critical for newborn survival.
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