1. Her speech is informal and filled with colloquialism.
   她的演讲是非正式的,很口语化。
2. Dress at the party was informal,with no neckties or fancy dresses.
   晚会上人们的服装很随意,不打领带,也没穿高档的西服。
3. The audience behaved indecorously as if the concert were an informal dress rehearsal.
   这些观众举止随便，仿佛这场音乐会是一场非正式的彩排。
4. The leaders met over informal lunches.
   领袖们在非正式午餐时进行会晤。
5. A governments bote man government spokesman says the government is trying to discourage informal schools.
   一名政府的发言人说政府正在试着取消非正规学校。
6. I got an informal reception.
   我受到了非正式接待。
7. The meeting was very lively and informal with everyone chipping to supplement or refute what the speakers said.
   会议开得很活跃, 不拘束, 每个人都能插话补充, 或反驳发言者的讲话。
8. One-half or more of the developing world's nonagricultural workers are employed in the underground informal sector, according to the International Labour Organization.
   据国际劳工组织的数字，在发展中国家，仍有占一半甚至更多的非农劳动力在地下经济领域就业。
9. 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，经常有非正式的棒球比赛。男孩女孩，年轻的年老的，都会轮流比赛。每个队有9个球员。
10. During piano playing and teaching, we should pay attention to rhythm changing of formal or informal rhythm, strong or weak beat, syncope or link line tercet or various slur.
    在钢琴教学及演奏中，要注意正规节奏与不正规节奏、强起拍与弱起拍、切分音与连结线、三连音及各种连音符等节奏的变化。

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