Nail biting, thumb sucking, hair twirling, foot tapping.

爱咬指甲，吮姆指，绕头发，跺脚。

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The edge must slice his thumb because his hand flies to his mouth, and he's sucking hard, eyes wide open.

纸片一定是划到他大拇指了，他的手里刻缩了回去，嘴用力吸着大拇指，瞪大双眼。

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Furthermore, I made some errors of omission, sucking my thumb when new facts came in that should have caused me to re-examine my thinking and promptly take action.

此外，我范了误差的错误，当新问题出现时，我正在啃手指，这本应该是让我重新审视自己的判断，并且迅速作出反应的时候。

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Parents often wonder what effect thumb sucking or sucking on a pacifier might have on their baby's teeth.

VOA: special.2009.03.11

The American Academy of Family Physicians says most children stop sucking their thumb by the age of four.

VOA: special.2009.03.11

When people look at an unborn baby sucking its thumb, they see it as a human being, says Josephine Quintavalle, of Alive and Kicking, a pro-life campaign group.

ECONOMIST: Abortion

Apple is taking that supposedly wasted cash hoard and kicking serious ass while the rest of the computer industry sits around sucking its thumb and starts complaining about big, bad Apple cleaning up components and shutting them out.

FORBES: Apple Flashes Cash As Japan Supply Chain Woes Continue