(chiefly poetic literary or humorous)an expression of grief, pity, or concern (主 诗 文 或 幽默)哎呀,唉(表示悲痛、遗憾或关心) alas, my funds have some limitations. 唉,我资金有限。
语源
Middle English : from Old French a las, a lasse, from a 'ah' + las(se) (from Latin lassus 'weary')