非正式的

We visited the new comer without ceremony.

我们对新来者作了一次正式拜访。

Her speech is informal and filled with colloquialism.

她演正式,很口语化。

The audience behaved indecorously as if the concert were an informal dress rehearsal.

这些观众举止随便，仿佛这场音乐一场正式彩排。

At summer picnics,there is often an informal baseball game.Boys and girls,the young and the old,take turns to bate.Each team has 9 plyers.

夏日夜餐时，经常有正式棒球比赛。男孩女孩，年轻年老，流比赛。每个队有9个球员。