occasion-主題

occasion

[ə'keiʒən]

n.場合, 時機, 理由, 機會, 盛大場面 
vt.引起, 致使

例句與用法：

I've met her on several occasions recently.

我最近見到過她好幾次。

You should go there if occasion arises.

如果有機會，你應當到那裡去。

There was no occasion to be so rude.

沒有理由這樣粗魯。

I was not at home on that occasion.

那時我正好不在家。

I only wear a tie on special occasions.

我只在特殊場合才打領帶。

詞形變化：

動詞過去式: occasioned | 動詞過去分詞: occasioned | 動詞現在分詞: occasioning |動詞第三人稱單數: occasions |

英文解釋:

名詞 occasion:

an event that occurs at a critical time

同義詞：juncture

a vaguely specified social event

同義詞：affair, social occasion, function, social function

reason

the time of a particular event

an opportunity to do something

動詞 occasion:

give occasion to

以上來源於大辭典