骤然

The news of plummeting stock prices dismayed speculators.

股骤然下跌的消息使股民大为失望。

It is pretended, that I am retarding the cause of emancipation, by the coarseness of my invective, and the precipitancy of my measures.

有人说，我采取粗俗漫骂的言辞和骤然激烈的手段，在这场解放业中不过是装腔作势而已。