A sanatorium is a kind of hospital where people stay a long time to get better after a serious illness, with rest, clean air, and a lot of care — not a clinic you visit for one afternoon.

A sanatorium is a kind of hospital所謂sanatorium，是一種醫院 where people stay a long time to get better after a serious illness人在生了重病之後會住很長一段時間慢慢康復, with rest, clean air, and a lot of care靠的是休息、乾淨的空氣和大量的照顧 — not a clinic you visit for one afternoon不是那種去一個下午就走的診所。

For many years the picture in English was a quiet building in the mountains or by the sea, especially for people with a lung disease called TB. Doctors believed rest would do the healing.

For many years多年來, the picture in English was a quiet building in the mountains or by the sea英文裡的畫面是山上或海邊一棟安靜的建築, especially for people with a lung disease called TB尤其是給得了肺結核（TB）的人住的。Doctors believed rest would do the healing醫生相信休息就能把病養好。

Those big old sanatoriums have mostly closed. Today the word feels a little old. Families more often say a recovery hospital, rehab, or just hospital.

Those big old sanatoriums have mostly closed那些又大又老的sanatorium大多已經關閉了。Today the word feels a little old今天這個字聽起來有點老派。Families more often say a recovery hospital, rehab, or just hospital一般人比較常說recovery hospital（療養醫院）、rehab（復健），或直接說hospital。

American English often writes sanitarium, which is the same broad idea; though actually some American speakers used sanitarium for a health farm or, in older times, a place for mental illness, so the two spellings are close cousins, not perfect twins.

American English often writes sanitarium美式英文常常拼成sanitarium, which is the same broad idea意思大致一樣; though actually不過其實 some American speakers used sanitarium for a health farm有些美國人會用sanitarium指健康農場 or, in older times, a place for mental illness或者更早以前指精神病院, so the two spellings are close cousins, not perfect twins所以這兩種拼法算是近親，不是完全一樣的雙胞胎。

You will meet sanatorium in history, novels, and old signs more than on a modern hospital door.

You will meet sanatorium in history, novels, and old signs你會在歷史、小說，還有老招牌上遇到sanatorium這個字 more than on a modern hospital door而不是在現代醫院的門上。