Keys
n. 关键帧；（钢琴等的）键；密钥（key的复数）
🗣️ 情景例句
you know how Dad is always talking about
知道爸爸时常谈起
Calm down!
冷静点！
First of all, they may have come to this planet of ours thousands or millions of years ago,
首先，他们可能在几千年前或几百年万年前已来过我们地球，