Whosis
n. 不知其名的或一時想不起名字的人或物
??? 情景例句
My pleasure.
不客氣。
He is playing on the swings outside.
他正在外面蕩秋千。
that people have for years assumed that the process of losing vigour with time,
多年來就已認識到。生命力隨著時間流失而喪失活力，