sudden

突然的、忽然的、意外的

His sudden death left the whole department in shock.

他突然過世，讓整個部門都非常震驚。

急遽的、驟然的、陡然的

A sudden drop in temperature caught many hikers unprepared.

氣溫驟降，讓許多登山客毫無準備。

猛然的、倉促的

She made a sudden move toward the door and knocked over the lamp.

她猛然朝門口一動，把檯燈撞倒了。

突然、忽然all of a sudden

All of a sudden the lights went out and everyone fell silent.

燈忽然全暗了下來，大家都安靜下來。