Navaids
(navaid 的復數) n. 助航系統
??? 情景例句
I'm busy packing for the journey.
我為外出旅行，正忙著打點行李。
Do you like playing cards?
你喜歡玩撲克？
they are not prepared even to admit the possibility that noise affects people.
甚至不愿承認噪音可能對人有影響。