Some rare people can feel beneath, can sense a change or hear a secret signal.

少数罕见的人能够洞察隐秘，能感到变化和听到神秘的信息。

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Warily, the Sydney closed to within a nautical mile, challenging the Kormoran to show a secret signal and prove she was a friend.

悉尼号小心翼翼地靠到距它一海里的地方，要求Kormoran出示秘密信号，以证明它是朋友。

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The Germans had no secret signal – they fired at close range, wrecking the Sydney’s bridge and killing most of her senior officers.

德国人没有出示秘密信号——他们近距离开了火，炸毁了悉尼号的舰桥，炸死了许多悉尼号高级军官。

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He claims that he and the Toaster developed the secret signal over the many years that Mr. Jerome has been watching.

WSJ: A Midnight Dreary for Those Who Seek Tell-Tale Signs of Poe's Elusive 'Toaster'

Later, Inspector General Glenn Fine and his investigators discovered at least 17 other documents loaded with top secret signal information and code words that Gonzales had mishandled in violation of Justice Department rules and potentially in violation of federal criminal laws.

NPR: Report: Ex-AG Gonzales Mishandled Classified Info