The blueberry gets acid to make it taste more like blueberry.

蓝莓变酸，使其尝起来更像蓝莓。

If the blood becoming really acidic can have major effects throughout the body.

如果血液变酸，会对全身造成影响。

And that's makes the bread sour.

这让面包变酸了。

Well, yogurt is soured milk, so it's difficult to say at which point it sours, because it's already sour.

嗯，酸奶就是酸了的牛奶，所以很难判断它是什么时候变酸的，因为它已经酸了。

When these bacteria ferment the milk and make it acidic enough, the structure of those casein proteins starts to change.

当这些菌使得牛奶发酵变酸时，这些酪蛋白子构会开始变化。

Farmers also faced a resurgence in citrus greening, an untreatable bacterial disease that turns oranges sour before killing the tree.

果农们还面临着柑橘黄龙病的再次暴发，这是一种无法治愈的细菌疾病，会使橙子变酸，后使树木枯死。

The milk has gone sour, but initially I don't know what it is.

牛奶变酸了，但起初我不知道那是什么。

It's gone sour, and you might as well throw out this bread, too.

它变酸了，你还不如把这面包也。

And then all of a sudden, it was souring, right?

- 后突间， 它变酸了， 对吧？

Or, " This cream has gone sour" .

或者，“这奶油已经变酸了”。

Then they put something like smoky thing to make it sour.

后他们加入一些类似熏制的东西使其变酸。

" As soon as a priest comes into my house the cream turns sour" !

“牧师一进我家， 奶油就变酸了” ！

Something inside me had gone sour.

我心的某些东西变酸了。

They will remain in this condition three weeks or a month without souring, and secure from frost.

它们将保持这种状态三周或一个月而不会变酸，并且不会霜冻。

Did you make sure that the milk wasn't sour and that none of the ingredients were spoiled?

瑞秋：你确定牛奶没有变酸，而且所有食材都没有变质吗？

It's really frustrating for me when food or when drinks go bad, that means the milk is sour.

当食物或饮料变质时， 我真的很沮丧，这意味着牛奶变酸了。

Well, if you put milk out in the sun, eventually the milk will sour.

好吧，如果你把牛奶放在太阳下，最终牛奶会变酸的。

I can tell she knows, it's like a smell, her knowledge; something gone sour, like old milk.

我能看出她知道，这就像一种气味，她的知识;有些东西变酸了，就像旧牛奶一样。

This milk isn't quite sour but it would be if I left it out here for a long time.

这牛奶不太酸，但如果我把它放在这里很长时间就会变酸。

When you have a food or a drink that is not eaten quickly enough, sometimes it will go sour.

当食物或饮料没有及时食用时，有时会变酸。