Google concentrates on advertising as its main revenue stream, with the idea that anything it can do to make getting online faster and easier, from as many places as possible is a good thing.

Google专注于把广告作为主要收入来源，并想尽办法让上网变得越快越方便。

youdao

The main idea of this paper is to determine the fatigue level by getting the information of the driver face and image detecting.

本文主要思想是通过对驾驶员脸部信息的获取和图像检测，进行疲劳判断。

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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

Linda Griffith, a tissue engineer at MIT, said one of the main problems of the idea would be getting all the right cell types to grow in the right places.

BBC: Artificial liver 'could be grown'