par·en·thet·i·cal /ˌpærənˈθetɪkəl◂/ (also parenthetic /-ˈθetɪk◂/) adjectiveadj formal ALADDsaid or written while you are talking or writing about something else in order to explain something or add information 补充性质的,附带说明的 parenthetical references to his childhood 关于他童年时期的补充说明
—parenthetically /-kli/ adverbadv