We all have our thumb down as well.

全部把大拇指比向下吧。

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Offer the baby a pacifier, help her find her thumb, or slip your own clean pinkie into her mouth, nail side down.

给宝宝一个安抚奶嘴，帮她找到自己的拇指；或者，悄悄地把你自己已经弄干净的小拇指放进她嘴里，指甲朝下。

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She stooped down, picked the fish up carefully between forefinger and thumb and threw it into the river.

她弯下腰，小心地用食指和拇指捡起鱼，然后扔进河里。

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As you listen to this review, imagine a thumb pointing down.

NPR: Committee Embraces Defense Nominee Gates

Bopara, bravely defying his thumb injury to bat at seven, lofted Powar down the ground for four and Collingwood launched successive big sixes off Tendulkar.

BBC: India victory keeps series alive

Imagine browsing a webpage and running your thumb along the side of your iPhone to scroll up and down.

FORBES: CES: Sensus Touch-Sensitive iPhone Case Rewrites Rules On Smartphone Functionality