a. happening without warning or in a short space of time
n. 突然, 忽然
a. 突然的, 意外的, 快速的
1. The sudden rain caught us by surprise.
突如其来的雨让我们感到惊讶。
2. She felt a sudden rush of excitement when she heard the news.
当她听到这个消息时，感到一阵突如其来的兴奋。
3. There was a sudden loud noise outside the window.
窗外传来了一声突如其来的巨响。