他突然跑走了。
Tā tūrán pǎo zǒu le.
He suddenly ran away.
天气突然变冷。
Tiānqì tūrán biàn lěng.
The weather suddenly became cold.
一个突然的决定。
Yī ge tūrán de juédìng.
A sudden decision.
他的离开很突然。
Tā de líkāi hěn tūrán.
His leaving was very sudden.
