Liquefaction is the noun for something turning into a liquid, or being turned into one — the change itself, not the result. It is a technical word from science and engineering; in ordinary talk you would say 'melting' or 'it turned to liquid'.

Liquefactionliquefaction is the noun for是…的名詞 something turning into a liquid, or being turned into one某個東西變成液體，或被變成液體 — the change itself, not the result指的是那個轉變過程本身，不是結果。 It它 is a technical word from science and engineering是科學和工程領域的技術用字; in ordinary talk一般口語裡 you would say 'melting' or 'it turned to liquid'你會說「melting」（融化）或「變成液體了」。

Two places you will actually meet it. In chemistry and industry: the liquefaction of natural gas, where gas is cooled and squeezed until it becomes liquid so it can be shipped (that is what LNG means — liquefied natural gas).

Two placesthere are two places you will actually meet it你實際上會在兩個地方遇到它。 In chemistry and industry在化學和工業裡: the liquefaction of natural gasliquefaction of natural gas（天然氣的液化）, where gas is cooled and squeezed until it becomes liquid把氣體冷卻加壓直到變成液體 so it can be shipped好方便運送 (that is what LNG means — liquefied natural gas這就是LNG的意思——液化天然氣)。

And in earthquakes, which matters in Taiwan: soil liquefaction is when wet sandy ground is shaken so hard that it stops behaving like solid ground and starts behaving like thick liquid, so buildings tilt and sink into it. Taiwanese news reports use this word every time there is a big quake near soft ground.

And in earthquakes另一個是在地震裡, which matters in Taiwan這在台灣很重要: soil liquefactionsoil liquefaction（土壤液化） is when wet sandy ground is shaken so hard指的是潮濕的沙質地面被搖晃得太劇烈 that it stops behaving like solid ground and starts behaving like thick liquid以至於不再表現得像固體地面，而開始表現得像濃稠的液體, so buildings tilt and sink into it讓建築物因此傾斜、陷進地裡。 Taiwanese news reports台灣的新聞報導 use this word every time there is a big quake near soft ground每次軟弱地層附近發生大地震都會用這個字。

Note that liquefaction is not the same as melting. Melting needs heat. Liquefaction is the general word for becoming liquid by any means — by cooling and pressing a gas, by shaking wet soil, by chemicals breaking something down. Melting is one way in; liquefaction is the whole doorway.

Note that請注意 liquefactionliquefaction is not the same as melting跟melting（融化）不一樣。 Meltingmelting needs heat需要熱。 Liquefactionliquefaction is the general word for becoming liquid by any means是「用任何方式變成液體」的統稱 — by cooling and pressing a gas像是把氣體冷卻加壓, by shaking wet soil或搖晃潮濕的土壤, by chemicals breaking something down或用化學方式把東西分解。 MeltingMelting is one way in是其中一種進去的方式; liquefactionliquefaction is the whole doorway是整扇門。