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One sign that escapes most people is the flashing of a microexpression.

一个大多数人都会表现出的征兆就是一闪而过的微表情。

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A flashing yellow beacon above an intersection, above a warning sign or on an obstruction in the road, warns you to drive with caution.

悬挂在十字路口上方，或是在警告标志上方或是在公路障碍物上闪烁的黄色信标灯，警告司机要注意安全行驶。

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When people act against their self-interest I see a flashing neon sign: Interesting Psychology Here!

FORBES: How Politicians Use The IDEA Of Choice To Pick Your Pocket On Healthcare, And Everything Else

Moussaoui had smiled as he walked into court, flashing a victory sign and waving sarcastically at the judge.

CNN: Moussaoui curses America but judge gets final word

We filmed 15 vehicles including a bus, a post van and numerous cars which, according to a flashing speed warning sign, were breaking the limit.

BBC: Will a borough-wide 20mph speed limit work?