它经常改变位置,非常不易被发现。
It is changing location constantly, it is very difficult to discover it.
在设计的过程中,很多潜藏的错误不易被发现,例如死锁。
During the process of the design, some lurking problems are very hard to be found such as deadlocks.
把秘密情报投放点选择在东西留在那里而不易被发现却可以让别人安全的取走的地方。
Take the dead-letter drop, where an item can be left inconspicuously and securely for someone else to pick up.
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