occasion 前面用什么介词

如题所述

occasion
英 [əˈkeɪʒn] 美 [əˈkeʒən]
n. 机会,时机; 场合; 理由; 需要
vt. 惹起,引起;
复数: occasions 过去式: occasioned 过去分词: occasioned 现在分词: occasioning 第三人称单数: occasions
On one occasion, his father threw a radio at his mother.
他父亲曾有一次拎起收音机砸向他的母亲。
The good weather helped to make the occasion a resounding success.
天公作美,使得这次活动获得了巨大成功。
It is always an important occasion for setting out government policy.
这历来都是阐明政府政策的重要时机。
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