Airstones
(airstone 的復數) [醫]砂濾多孔石, 氣石
??? 情景例句
You won't believe this,
簡直不會相信，
Behind bad luck comes good luck.
塞翁失馬，焉知非福。
at eighty can knock us out, and into our grave.
能到了80歲可能會使我們一蹶不振而進入墳墓。