a salvo of guns/rockets 枪炮／火箭弹齐射

（突然发出的）一阵，一片（巨大的响声）

a sudden loud sound made by many people at the same time

Every joke the comedian made was greeted by a salvo of laughter from the audience. 喜剧演员的每一个笑话都能赢得观众的哄然大笑。

演讲的开篇；行动的第一炮

the first part of a speech or the first in a series of actions intended to get a particular result

In his opening salvo the speaker fiercely attacked the government's record on healthcare. 演讲者在开场白中猛烈抨击政府在卫生保健领域的所作所为。