有些可能具有爆炸性，它们是保密级别稍高的情报。
Some may be more explosive. They are intelligence reports so [they] come from a little higher level.
在其他国家中漫步者使用的那种详细地形图被严格设定密级。
Detailed topographical maps of the kind commonly used by ramblers in other countries are strictly classified.
在其他国家中漫步者使用的那种详细地形图被严格设定密级。
Detailed topographical maps of the kind commonly used by ramblers inother countries are strictly classified. Schoolchildren get no trainingin how to read them.
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