Which foods do and don't freeze well? 哪些食物適合冷凍保存？

本集內容

Which foods do and don’t freeze well?

哪些食物適合冷凍保存？

文字稿

Which foods do and don’t freeze well?

適合與不適合冷凍的食物有哪些？

You might have leftovers or want to batch cook.

你也許有吃不完的剩飯或者想要一次做一大批食物。

（Source: US Department of Agriculture 信息來源：美國農業部）
Well, you can safely freeze most foods – but not all will still taste good.

雖然你可以安全地冷凍大多數食物，但並不是所有食物經過冷凍後的口感依然良好。

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凍後會變得軟塌塌、稀糊糊。這是因為水在結冰時會膨脹，從而導致賦予植物硬性結構的細胞壁發生破裂。

Mayonnaise and cream can separate and curdle.

蛋黃醬和奶油會分層並結塊。

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

它們都是將油和水微妙結合的乳化物，而油和水在解凍後會發生分離。

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

你可以冷凍煮熟的米飯，但在冷凍之前需要讓米飯快速地冷卻下來。

（Source: UK Food Standards Agency 信息來源：英國食物標準局）
Bacterial spores on the rice could start multiplying and may cause food poisoning otherwise.

如果不這樣冷卻的話，米飯上的細菌孢子可能會開始繁殖並可能導致食物中毒。

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.

不論你想要冷凍哪些食物，把它們包裝好非常重要。當冷凍食品接觸空氣時，水分會開始隨著時間減少，這個過程叫做升華，它讓食物的質地變得粗糙、變色或變得幹癟。

（Source: US Department of Agriculture 信息來源：美國農業部）
It’s still safe to eat, but you might want to cut off those freezer-burnt bits first.

脫水後的食物依然可以安全地食用，但你可能需要先把被冷凍損傷的部分切除。

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

而且冷凍並不會殺死大多數微生物，隻是會讓它們暫時失去活性。

（Source: US Department of Agriculture 信息來源：美國農業部）
They can start growing again once thawed, so remember to handle defrosted food with care.

這些微生物會在解凍後重新開始生長，所以請記得要小心處理解凍後的食物。