Cogredient
[数]同步的, 协步的
🗣️ 情景例句
Grandpa! Grandpa!
爷爷！ 爷爷！
Then, all of a sudden, it became cloudy and began to rain.
可是突然天就变了，乌云密布并下起雨来。
Six hundred years ago,
600年前，