China's latest stealth fighter might be cloned from the debris of a shot-down U.

中国最近研发的隐形战机，可能仿自被击落的美军战机f - 117残骸。

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SWAT teams sometimes use silencers, not for stealth, but to insure that they will be able to hear if one of the SWAT team membersfires a shot inside the confined space of a room.

特警小组有时 使用消音器，不是为了隐蔽，而是为了保证队员 在 室内狭小空间开火时还能听见声音。

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The Air Force argued it was a lucky shot, but the case for stealth was shaken.

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