Preludious
a. 序言的, 序幕的
🗣️ 情景例句
He was very helpful to me, remember?
他帮过我大忙， 记得吗？
It's essential.
这是必要的。
To protect themselves from the icy water, they had to wear special rubber suits.
湖水冰冷刺骨，他们必须穿上一种特制的橡皮服以保护自己。