Release your thumbs and let gravity do the rest .

松开你的拇指，剩下的工作就让重力来完成吧。

Be sure to keep both thumbs extended .

确保你的拇指都是伸展开的。

For which we give him two thumbs up .

因为，我们向他竖起了双手拇指。

Their thumbs sure must be sore .

他们的拇指一定很酸。

They looked at each other , thumbs poised above their blackberries .

他们相互看着，拇指在他们的黑莓手机上蓄势待发。