He was jovial to excess and laughed constantly with and without provocation.

他一天到晚乐呵呵的，不管有人逗他，没人逗他，他总是笑口常开。

They sting or bite without provocation; they fly uninvited into our rooms on summer nights, or beat against our lighted windows.

它们无缘无故地又叮又咬；夏天的晚上，它们未经邀请便飞到我们房间里，或者对着露出亮光的窗户乱扑乱撞。

Venomous without provocation. it's better than being a charity case.

无缘无故的恶毒 -总比施舍好。

But the truth never came to light and the version always prevailed that the royal guard, without provocation of any kind, took up combat positions upon a signal from their commander and opened fire without pity on the crowd.

但真相一直没有浮出水面， 而且一直盛行的说法是，皇家卫队在没有受到任何挑衅的情况下， 根据指挥官的信号进入战斗阵地， 毫不留情地向人群开火。