In other cultures, paragraphs may be organized to build toward the main idea, which is revealed at the end.

VOA: special.2009.04.30

If there's a group, responsibility to help decreases and this is captured in different ways but the main idea is we all think someone else will help so we don't. There's a diffusion.

如果是一群人，帮助的责任就会分散变小,这体现在多个方面,但最主要的想法就是我们都认为别人会帮助,所以我们就不帮助了，责任被分散了。

耶鲁公开课 - 心理学导论课程节选

z So the main idea here is z effective is not z, so don't try to plug one in for the other, they're absolutely different quantities in any case when we're not talking about a 1 electron atom.

所以这里主要的观点是有效的z不同于，所以不要尝试将一个插入到另一个，当我们不在讨论1个电子的原子时,它们在任何情况下是绝对不同的量子数。

麻省理工公开课 - 化学原理课程节选

He also says non-native speakers generally use too much emotional language and give too many details before getting to the main idea.

VOA: special.2009.04.30

The idea of bridging Ivory tower and Main Street.

也就是，搭起学校与社会之间的桥梁的想法。

哈佛公开课 - 幸福课课程节选

But in the United States, the main idea of each paragraph should be in the first sentence.

VOA: special.2009.04.30

American college students are expected to state their main idea at the beginning of the paper.

VOA: special.2009.04.30

He said each show has a main idea or theme.

VOA: special.2010.01.08

Bryan's main campaign idea was that the gold standard would ruin America's economy.

VOA: special.2010.07.01

McKinley's main campaign idea was that silver money would ruin the economy.

VOA: special.2010.07.01

"The original idea for Stockbridge at Christmas was actually conceived in 1956,'57 when Hallmark card corresponds with Rockwell on the idea of an image of an American main street which will symbolize Christmas in America,"

VOA: standard.2009.12.25