overwatch

基本解释

Lily: No,during the Second World War, as an air warder, he was appointed to overwatch four Japanese prisoners of war and had stayed up 5 days and nights in rows.
不，在第二次世界大战期间，他做为民防队员奉命看守4名日本战俘，曾连续5天5夜没有合眼。
The commanding officer of Australia's Overwatch Battle Group, Lieutenant Colonel Chris Websdane, told the departing soldiers that their mission had been a success.
澳大利亚监督战斗团的指挥官维布斯丹中校，对这些即将离开伊拉克的澳大利亚军人说，他们的使命已经成功。
The technique for crossing a danger area is another form of bounding overwatch .
穿越危险地段的技巧是掩护跃进的另一种形式。

Most turns are just run to cover then either shoot an alien or go into overwatch.
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American troops are shifting from leading operations, to partnering with Iraqi forces, and, eventually, to a protective overwatch mission.
NPR: Text of Bush's State of the Union Address