Cov
abbr. 恶棍城市（游戏名, City of Villains）；反障碍车辆（Counter-Obstacle Vehicle）；变异系数（Coefficient of Variation）
🗣️ 情景例句
Oh, thank you.
啊 ，谢谢。
From words to deeds is a great space.
言行之间，大有距离。
The last creature to compete with man was the mosquito.
能与人竞争的生物最后只有蚊子了，