为

ritual释义：

n. 仪式；惯例；礼制

adj. 仪式的；例行的；礼节性的

例句：

The dead included six people who attended this religious ritual.

死者中包括六名参加这场宗教仪式的人。

ceremory释义：

n. 典礼，仪式；礼节，礼仪；客套，虚礼

例句：

He was invited to speak as an outstanding student at the opening ceremony.

他被邀请作为优秀学生进行开幕仪式的发言。

词组：

opening ceremony开学典礼；开幕式；开幕仪式；开幕典礼。