Laughter is easier, minute by minute, spilled with prodigality, tipped out at a cheerful word.

笑声越来越随意，毫无节制出来，只要一句笑话就会引起笑。

Suddenly, the group burst into laughter.

【burst】突，这群人笑起来。

In a televised address, his audience laughed as he mocked the White House and said it is " afflicted by mental retardation" .

在电视发言上，鲁哈尼嘲笑了白宫，并称白宫正被智障疯狂折磨，引得观众笑。