Break out就是指戰爭、打斗或者火災等不愉快事件的發生,而這種發生通常都是突發的.
Fire broke out during the night.
夜間突然發生了火災.
They had escaped to America shortly before war broke out in 1939.
1939 年戰爭爆發前不久他們逃到了美國.
Fighting had broken out between rival groups of fans.
雙方球迷發生了打斗.
Engulf就是包圍;吞沒;淹沒的意思,是及物動詞
The vehicle was engulfed in flames. 汽車被大火吞沒。
He was engulfed by a crowd of reporters. 他被一群記者團團圍住。