rarefied

稀薄的

Climbers struggle to breathe in the rarefied air near the summit.

登山者在接近山頂的稀薄空氣中呼吸困難。

高深的、艱深的、深奧的

The lecture moved into rarefied theory that few students followed.

這場演講進入了艱深的理論，沒幾個學生跟得上。

上流的、小眾的、不食人間煙火的常帶貶義

She grew up in the rarefied world of competitive figure skating.

她成長於花式滑冰競賽那個小眾又封閉的世界。

使稀薄、稀釋rarefy 的過去式與過去分詞

The gas was rarefied until the pressure dropped sharply.

這種氣體被抽得稀薄，直到壓力急遽下降。