玩家即将遭遇到新的“罕见共同”感染者，被称为堕落幸存者，可借由杀死而随机掉落物品。
Players will also encounter a new "uncommon common" infected, dubbed the Fallen Survivor, which can drop random items when killed.
两个人有个共同的秘密，而这也象一种默契一样，两人对这个问题并不交谈，而这也不象人们所想的那样比较罕见。
Two men who have a secret in common, and who, by a sort of tacit agreement, exchange not a word on the subject, are less rare than is commonly supposed.
问题在于基因中许多罕见突变是否能够共同解释对疾病的巨大影响。
The question this leaves open is whether many rare variations in genes will collectively account for a large influence on common disease.
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