思嘉：这有点象作突破防线，是吗？

SCARLETT: it's a little like blockade running, isn't it? RHETT: it's.

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猪流感、禽流感，此类禽畜病不期与人共患，还进一步突破防线，实现了人际传播。

Swine flu, avian flu, such livestock disease with a total risk of unexpected, but also a further breakthrough line of defense to achieve interpersonal communication.

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