strategic reconnaissance meaning in English

战略侦察

The enemy has always looked down on us . after grabbing the four northeastern provinces at small cost , he occupied eastern hopei and northern chahar , all by way of strategic reconnaissance
敌人一向看不起我们，东四省得了便宜之后，加之以冀东、察北的占领，这些都算作敌人的战略侦察。
These two methods have been widely investigated for their usefulness and suitability for strategic reconnaissance surveys with wide - spaced sampling for delineation of broad geochemical patterns generating from concealed giant ore deposits
其结果表明： ( 1 )隐伏大型特大型矿床四周巨大的地球化学模式可以被各种营力搬运至地表，地气对超微量金属的搬运是厚覆盖区隐伏矿床在地表形成叠加含量地球化学异常的主要原因。