（一）明知住宿人员违反规定将危险物质带入住宿区域，不予制止的；
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Two tunnels, each 1.8 miles (3km) long, will bring in 120,000 litres of water every second to Hinkley's cooling system
Forgetting releaseLock() permanently breaks the stream. The locked property tells you that a stream is locked, but not why, by whom, or whether the lock is even still usable. Piping internally acquires locks, making streams unusable during pipe operations in ways that aren't obvious.