即使只有一个速度，我还可以爬合理的小山。
Even though there is only one speed, I can still climb reasonable hills.
否则，即使只有一个等位错配的基因，连接反应也不会发生。
Otherwise even when there is an allele mismatch between them, no ligation would take place.
但是在流感病毒即使只有一个很小变异的情况下机体也会不能识别。
But the body may not recognize a flu virus that has even a small change.
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