The most 10 plausible theory is that they have developed a secret method of locomotion which they are able to conceal from human eyes.

最可信的说法似乎是，它们练就了一种人类肉眼看不见的秘密的移动本领。

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Fortunately, DeGeneres tells Renee Montagne, she has a secret method of preparation: Lots of sit-ups.

NPR: Sit Up and Watch: Ellen Is Hosting the Oscars

Steiner Sports doubled that effort with what Brandon Steiner calls a "silent marking, " a secret method of ensuring the authenticity of the items.

FORBES

Even the Bar Council, which represents barristers, believes that the current secret method of appointment of silks is unsustainable and that in future they should be selected by a small panel chaired by a retired High Court judge.

ECONOMIST: Law