他顿时明白了我的意思。
tā dùnshí míngbái le wǒde yìsī 。
He immediately understood my meaning.
事故发生后,大家顿时慌乱起来。
shìgù fāshēng hòu , dàjiā dùnshí huāngluàn qǐlái 。
After the accident occurred, everyone immediately became confused.
她顿时感到无比的幸福。
tā dùnshí gǎndào wúbǐ de xìngfú 。
She immediately felt an immense happiness.