One way to hold this word: a pocket. Not the air itself — the little closed space that holds it. A pocket on a coat is a small room shut off from everything around it, and that is what the word does to air: it marks off one small bit of air from the rest. Sometimes that space is real and still, a bubble sitting inside wet cement. Sometimes it is only what it feels like: the plane drops, and the passengers say the air had a hole in it.
可以想成一個口袋。重點不在空氣，而在那個把空氣關住的小空間。衣服上的口袋，是一個跟外面隔開的小房間；這個字就是把同樣的事做在空氣上——從周圍的空氣裡圈出小小的一塊。有時候那個空間是真的、不動的，像水泥裡留下的一顆氣泡。有時候它只是感覺：飛機往下一沉，乘客就說空中好像有個洞。
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