Coam
abbr. coaming 舱口栏板; 边材; customerowned-and-maintained equipment 消费者自维修设备; equip customer-owned and-maintained equipment (data processing) 消费者自有维修设备（数据处理）
🗣️ 情景例句
Speaking of school, how are your grades this term?
谈到学业，你这学期的成绩如何？
He is planning his future already.
他已经在为将来做打算了。
and a period (which is the time it takes a wave crest to travel one wave length).
和周期（浪峰走过一个波长所需的时间）。