We are now living in a world where computers rule our work and daily life. So online searches have already become a must.

我们现在生活的世界里，电脑控制着我们工作和日常生活。因此，在线搜索已经成为一种必需品。

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Some applications have already become so widespread that they are taken for granted.

一些应用已经得到了大范围的应用，人们几乎意识不到这些应用。

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Scientists believe that the oceans have already become slightly more acidic over the last century.

科学家们认为海洋的酸性已经比上个世纪稍微大了一点。

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Online classes have already become part of an extended curriculum for many students.

WSJ: My Education in Home Schooling, by Quinn Cummings

Developing countries can borrow existing technologies from countries that have already become rich.

ECONOMIST: Economics focus

This year, the trendy wearables are all fitness trackers, which have already become something of a meme among gadget makers.

ENGADGET: Toshiba's concept smartwatch reads your pulse, pulls maps from your phone