The first one is disgusting, so " to retch" means to vomit or to try to vomit.

第一个是恶心，所以“to retch”是呕吐或试图呕吐的意思。

Jon had bitten his lip in his struggles. He could taste blood mingled with the thick, chalky potion. It was all he could do not to retch it back up.

琼恩刚才挣扎时咬破了嘴唇，而今鲜血和浓稠的白色药液混杂一起，他好容易才没有呕吐出来。

" I want to retch, " he said to Gerris Drinkwater. They were waiting for the ship's master to appear, sweltering in the heat as the stench wafted up from the deck beneath them.

" 我要吐了。" 他告诉盖里斯·丁瓦特。他们站在闷热的甲板上等待船主现身，浓重的臭味从底下不断蒸腾上来。

Then you're going to pull the marrow bones from the boiling water and set to cool for a few moments while you get rid of the scary bone water and try not to retch.

然后你要把骨髓从沸水中拉出来，冷却一会儿，同时排出可怕的骨水，尽量不要干呕。