这些新基因提供了复制的优势，使这种混合病毒弥漫散布在密集挤满猪的养猪场，养猪场饲养的猪例行被运往美国各地。

These new genes provided replication advantages that allowed the hybrid to permeate densely packed pig farms whose inhabitants were routinely shipped across the United States.

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战斗区里四处散布着熊熊燃烧的车辆，他们穿越弥漫的烟雾，冲进一座螳螂人的要塞，花了一小时把它扫荡干净。

They cross the combat zone, hazy with the smoke of burning vehicles, and for an hour they work to clear out a stronghold of mantids;

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