知道了这四个种族已经有至少一万年历史，科学家重新计算了病毒的“分子钟”，测量病毒的变异速度。
Knowing that all four strains were at least 10,000 years old, scientists recalculated the virus's "molecular clock," measuring how fast it mutates.
知道了这四个种族已经有至少一万年历史，科学家重新计算了病毒的“分子钟”，测量病毒的变异速度。
Knowing that all four strains were at least 10, 000 years old, scientists recalculated the virus's "molecular clock," measuring how fast it mutates.
也许是更好地适应了环境的变化，植株进一步的变异可能因此会以更快的速度涌现。
New variations of plants, perhaps better adapted to a change in environment, could therefore arise much more quickly than previously thought.
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