BT客户端在接收到每一份数据库包的时候都会检查数据完整性。如果一个数据库检查发现问题则会重新下载。所以这是一个很普遍的现象，不需要担心的。
Bittorrent clients check the data they receive for integrity. When a piece fails this check it is automatically re-downloaded. Occasional hash fails are a common occurrence, and you shouldn't worry.
一个得了普通感冒的患者看过病后，会拿5盒药，还要打点滴，这是很普遍的现象。
It's not uncommon for a patient to go to a doctor with a common cold and be sent home with five boxes of pills and an iv drip.
这幅图反映了一个在中国很普遍的现象，即父母们都望子成龙，尽管这是一个我们都能够理解的现象。
The drawing reflects a common phenomenon in China that parents are obsessed with the wish of their child's future success, which is, though, very understandable.
这幅图反映了一个在中国很普遍的现象，即父母们都望子成龙，尽管这是一个我们都能够理解的现象。
The drawing reflects a common phenomenon in China that parents are obsessed with the wish of their child's future success, which is, though, very understandable.
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