【評論主題】6 n. grouping symbols ()(A) reply (B)) parentheses (C) elevator (D) grasp

【評論內容】pa·ren·the·sis (pə-rĕn′thĭ-sĭs) n. pl. par·en·the·ses (-sēz′) 1. Either or both of the upright curved lines, ( ), used to mark off explanatory or qualifying remarks in writing or printing or enclose a sum, product, or other expression considered or treated as a collective entity in a mathematical operation.