n.偵察；勘察

A patrol was sent on reconnaissance. 一支巡邏隊被派去執(zhí)行偵察任務(wù)。

The squadron flew a reconnaissance mission. 該空軍中隊執(zhí)行一偵察任務(wù)。

A reconnaissance plane was circling over the enemy's position. 一架偵察機(jī)正在敵人陣地上空盤旋。

The uranium reconnaissance was undertaken in the U.K. 在英國境內(nèi)曾開展過鈾礦勘察工作。