Among them, servers, especially the WEB server, are easily attacked.
其中服务器，特别是WEB服务器很容易遭受攻击。
One person standing alone is easily attacked and defeated, but two can stand back-to-back and conquer.
一个人遭受攻击易被击败，但两个人背靠背就容易取胜。
Wild animals are immune to some severe infectious diseases, whereas human beings are easily attacked by them.
野生动物对有些重症传染病有免疫力，然而人类却极易遭受这些疾病的侵袭。
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