他们担心野生植株也会获得经过基因转变的抵抗性。
They note concerns that wild plants could, as a result, gain genetically engineered resistances.
一份相关报道关注到了牛随时间发生的基因转变。
A related report looked at genetic changes in cattle over time.
塔特萨尔博士认为，转变到人类的飞跃产生已经很突然，或许由于几个重要的基因变化。 这就是为什么这个转变在化石记录里很难找到。
Dr. Tattersall believes the leap to humans may have been brought about very suddenly, perhaps by a few critical genetic changes, which is why the transition is so hard to trace in the fossil record.
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