本集内容

Which foods do and don't freeze well?

哪些食物适合冷冻保存？

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Which foods do and don't freeze well?

适合与不适合冷冻的食物有哪些？

You might have leftovers or want to batch cook.

你也许有吃不完的剩饭或者想要一次做一大批食物。

（Source: US Department of Agriculture 信息来源：美国农业部）
Well, you can safely freeze most foods – but not all will still taste good.

虽然你可以安全地冷冻大多数食物，但并不是所有食物经过冷冻后的口感依然良好。

Vegetables and fruit with a high water content will go limp and mushy after defrosting. That's because the water expands as it freezes, bursting the cell walls that give the plant its rigid texture.

水分含量高的蔬菜和水果在解冻后会变得软塌塌、稀糊糊。这是因为水在结冰时会膨胀，从而导致赋予植物硬性结构的细胞壁发生破裂。

Mayonnaise and cream can separate and curdle.

蛋黄酱和奶油会分层并结块。

They are emulsions that delicately bind together oil and water, which all fall apart after defrosting.

它们都是将油和水微妙结合的乳化物，而油和水在解冻后会发生分离。

You can freeze cooked rice, but you'll need to cool it down quickly first.

你可以冷冻煮熟的米饭，但在冷冻之前需要让米饭快速地冷却下来。

（Source: UK Food Standards Agency 信息来源：英国食物标准局）
Bacterial spores on the rice could start multiplying and may cause food poisoning otherwise.

如果不这样冷却的话，米饭上的细菌孢子可能会开始繁殖并可能导致食物中毒。

Whatever you freeze, it's important to wrap it well. If it comes into contact with air, it starts to dehydrate over time in a process called sublimation and go leathery, change colour or shrivel.

不论你想要冷冻哪些食物，把它们包装好非常重要。当冷冻食品接触空气时，水分会开始随着时间减少，这个过程叫做升华，它让食物的质地变得粗糙、变色或变得干瘪。

（Source: US Department of Agriculture 信息来源：美国农业部）
It's still safe to eat, but you might want to cut off those freezer-burnt bits first.

脱水后的食物依然可以安全地食用，但你可能需要先把被冷冻损伤的部分切除。

And freezing won't kill most microbes – it only inactivates them temporarily.

而且冷冻并不会杀死大多数微生物，只是会让它们暂时失去活性。

（Source: US Department of Agriculture 信息来源：美国农业部）
They can start growing again once thawed, so remember to handle defrosted food with care.

这些微生物会在解冻后重新开始生长，所以请记得要小心处理解冻后的食物。