一、【近义词】
马上、立刻、立即、立时、即刻、霎时
二、【基本解释】
◎ 顿时 dùnshí
[immediately;at once;forthwith] 立刻,一下子
顿时,欢呼声震荡着整个山谷
三、【英文翻译】
1.immediately; suddenly; at once; forthwith; in a short space
四、【详细解释】
立刻。多用于叙述已过去的事情。《二十年目睹之怪现状》第六回：“我听了这话，吃了一大吓，顿时呆了。” 陈其通 《万水千山》第二幕：“顿时，一轮红日升起，放射出万道金光。” 杨沫 《青春之歌》第二部第四章：“星期天的早晨，被柳树包围的 五里庄 的小河边，来了十几个旅行的小学生，就顿时异常热闹起来了。”
五、【短语造句】
你可以想象，当我透露出这种想法时，电话那端顿时鸦雀无声的情景。
You can imagine the silence on the other end of the phone when I made that call!
他的嘴顿时灌满了鲜血。
Immediately, his mouth filled with blood.
顿时，对于那此有胆识和魄力的人们，加那利群岛现在已不再遥远和难以找到。
Suddenly, for those with the guts and the gumption, the canaries were no longer as far away or as difficult to find.
守在电视机前的大卫看完现场播报的各种惨状，顿时觉悟：“我们的公民自由一去不复返了。”
After watching the awful images on television, he suddenly understood: "there go our civil liberties."
三个孩子的脸顿时阴霾尽散，还在后排座位蹦蹦跳跳，笑笑嚷嚷起来。
All at once, the three children's faces lit up, and they began to bounce around in the back seat, laughing and chattering.