Quadtatic
[计] 二次平均的
🗣️ 情景例句
No, thank you. It's too late. I really have to go.
不，谢谢。太晚了，我真的该走了。
When did you call?
你什么时候打电话来的？
The noise had been so faint that no one though that the ship had been damaged.
由于这个声音非常轻，没人会想到船身已遭损坏。