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）。

youdao

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