茶叶是在大约5000年前被偶然发现可作为饮料饮用。
Tea was discovered as a kind of drink by accident about 5,000 years ago.
他们的癌症大部分在做其他普通检查的被偶然发现，并可能通过手术而治愈。
Their cancer was discovered largely by accident when they were being examined for other medial conditions, and so was potentially curable by surgery.
未破裂的动脉瘤可能是无症状，被偶然发现，或者是有症状，表现为对邻近心脏结构急性的压迫效应。
Nonruptured aneurysms may be asymptomatic and incidentally discovered, or they may be symptomatic and manifest acutely with mass effect on adjacent cardiac structures.
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