这种方法所带来的缺点是，处理以更高的速率扫描所有协议控制块 (PCB) 的开销。

The drawback with this approach is handling the overhead of scanning all the protocol control blocks (PCBs) a higher rate.

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以赛车为例，如果一名驾驶员在撞车后被送往医院，胶囊中带有的金属就会使核磁共振扫描失效，因为核磁共振仪最核心的装置是一块强磁铁。

In motor racing, for instance, if a driver is taken to hospital after a crash the metal in the capsule would prevent the use of an MRI scanner, which is essentially a powerful magnet.

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然而，对于表扫描，块锁不会推迟。

However, block locking was not be deferred for table scans.

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