Odynophagia, which means that swallowing is painful.

吞咽痛，意思就是吞咽导致疼痛。

These have their points turned backwards, and help to hold the prey while it is being swallowed.

齿尖是朝后的， 极北蝰吞掉猎物的时候， 这些牙可以抓住猎物， 不让猎物跑掉。

What he swallows is air; and this is the only way in which the air gets to his lungs.

它吞食的就是空气, 正是通过这样一种方法, 青蛙的肺部才能吸收到空气。

Swallowing is a sign of strong emotion.

吞咽是强烈情感的表现。

The hardest to swallow is a taste of your own medicine.

最难下咽的往往是你自己造就的苦果。

Or make us think that swallowing a tablespoon of cinnamon is suddenly a good idea.

或者让我们认为吞下一汤匙肉桂突然是个好主意。

(the Right Whale, and the varieties of that order) , concerning which the fishermen have this saying, " A penny roll would choke him" ; his swallow is so very small.

（露脊鲸及其各种变种），关于这种鲸，捕鲸者历来有这样的说法，“一便士的小面包卷就能把它噎住”，说明它的嗓子眼很小很小。