真的那間玻璃屋
這一支就是核心畫面本身，沒有比喻成分。
noun · B2
A building with glass walls and a heater inside, used for growing plants that cannot take cold weather. It is kept warmer than the air outside, so delicate plants and fruit keep growing through the winter.
溫室
核心畫面
One way to hold this word: a glass room with a heater running inside it. Outside there is frost on the path; inside the glass is fogged, the air is warm and damp, and a plant from a hot country keeps its leaves all through January. Nothing about that room is gentle — it is shut in, and it is pushed. Everything else the word does is this room with something other than a plant inside it.
可以想成一間開著暖氣的玻璃屋。外面結著霜，裡面玻璃蒙著霧，空氣又暖又濕。一棵熱帶來的樹在一月還留著滿樹的葉子。這間屋…更多收起
可以想成一間開著暖氣的玻璃屋。外面結著霜，裡面玻璃蒙著霧，空氣又暖又濕。一棵熱帶來的樹在一月還留著滿樹的葉子。這間屋子的重點有兩個：關得緊，而且是被硬推的。hothouse 後來的每一種用法，都像是把這間屋子留著，只把裡面的植物換成別的東西——換成一群人、換成一個小孩，甚至換成整顆星球。From the word’s history
Wiktionary gives Middle English hothous, simply hot + house. The word has never stopped meaning what its two parts say, which is why the picture is so easy to carry into the other uses.
Wiktionary 的說法很單純：來自中古英文 hothous，就是 hot ＋ house 兩個字拼起來。這個字從頭到尾都沒有離開過字面意思，所以那幅畫面才能一路帶著走。
Wiktionary entry for hothouse, packet source_ref kaikki:3f6f69a190036ae4:1251344595 — 'From Middle English hothous, equivalent to hot + house.'
Three branches
把人放進溫室：又熱又密閉的環境，以及催熟小孩
把玻璃屋留著，植物換成人。關得緊、溫度硬拉高，所以裡面的東西長得比外面快——差別只在長的是想法、情緒，或是一個小孩的能力。
noun · C1
Used in front of words like atmosphere, environment or world to say that a place is closed in and intense, so that ideas, talk and feelings all grow unusually fast there. The same meaning also appears with the noun standing alone — a hothouse of new ideas.
熱烈緊繃的（氛圍）
把整顆星球關進溫室
同一間屋子，放大到整個大氣層：熱進得來、出不去，裡面就一直升溫。
noun · C2
In writing about climate, a state in which a whole planet is far hotter than it is now. Scientists use it both for very warm periods in the Earth's past and for a possible future.
（氣候）極熱狀態