Some hide behind the mask of performance.

有些人躲在“表现”这个面具后。

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Behind the mask of friendliness, I know he really dislikes me.

在友善的面具后面，我知道他其实并不喜欢我。

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To be "Machiavellian" came to mean to be a sly schemer, one who hides his evil intentions behind the mask of executive necessity.

“如同马基维利”意味将邪恶的意图隐藏在合理面具下的狡猾阴谋家。

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Thanks to a few pesky Internet lawyers, people who make nasty comments on the web may soon find it harder to hide behind the mask of anonymity.

FORBES: Lawsuits Against Web Trolls?Are On The Rise

But Crystal and his co-writers (Lowell Ganz and Babaloo Mandel) aim to get behind the ironic mask of this Yiddish harlequin and reveal the fierce ambition and bitterness that fuel his put-downs.

NEWYORKER: Mr. Saturday Night

The judge said the defendant was "of course, hiding, behind a mask".

BBC: Judge rules three were defamed on Facebook