For freeze drying, the coffee is frozen and cut into pieces, then dried under vacuum at low temperatures.

冷凍乾燥法是將咖啡冷凍並切塊，然後在低溫下真空乾燥。

Both methods remove water to create the soluble coffee you just add water to.

這兩種方法都能去除水分，製成可溶咖啡，只需加水即可飲用。

Thank you, that is quite interesting.

謝謝，這很有意思。

But I'm wondering why they cannot just, you know, ground the coffee bean and, you know, they look like a coffee powder.

但我想知道，為什麼他們不能把咖啡豆磨成粉，看起來就像咖啡粉一樣呢？

It looks like exactly the same stuff.

看起來是一模一樣的東西。