When Google embarked on its program to digitize copyrighted books and copy them onto its servers, it did so in stealth, deceiving publishers with whom it was developing business relationships.

当Google着手数字化版权书籍时，也曾欺骗和他有商业关系的出版商，偷偷摸摸地向自已的服务器拷贝资料。

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Once accepted into the program, Auror training takes a further three years (OP29), and includes Concealment and Disguise as well as Stealth and Tracking (OP3).

一旦被吸纳进这个组织，傲罗就需要接受超过3年时间的训练（凤凰社，第二十九章），这包括了隐藏，伪装，秘密行动以及跟踪（凤凰社，第三章）。

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But Merck kept working on its CETP inhibitor anyway, in a stealth program unbeknown to Wall Street or the public.

FORBES

One of the most intriguing pieces of military history was the development and deployment of the stealth fighter program.

FORBES: What Network Security Can Learn from Stealth Fighters

"When we launched our beta program back in the summer of 2009 we emerged from stealth mode with a product that we had designed and developed internally, " recalls Matt Eagar, president and co-founder of ThinkFlood.

ENGADGET: Thinkflood intros RedEye Pro networked home automation controller