occasioned

v. 引起(使 ... 发生)
adj. 偶然引起的

例句与用法：

It happened on three separate occasions.

这件事在三个不同场合都发生过。

Stephen's behaviour occasioned his parents much anxiety.

斯蒂芬的行为使其父母十分担心。

What occasioned such an angry response?

何故引起如此愤怒的反应?