忽然hū rán
[suddenly]∶突然地,动作、行为的发生或情况的变化来得迅速又出乎意料地
霎时shà shí
[in a split second;in a twinkling;in a very short time] 极短的时间,片刻
蓦然mò rán
[suddenly] 忽然;猛然
猛然měng rán
[abruptly;suddenly] 突然,忽然
突然tū rán
[suddenly;unexpectedly;out of the blue;abruptly] 表示发生得很急促;忽然;猝然
猝然cù rán
[suddenly;unexpectedly] 突然地,出乎意料
