Not too long ago, scientists had to hoof it to the library to review the literature. And they had to flip through a card catalog to find that dusty old volume with the article they wanted.

不久以前，科学家还不得不亲自到图书馆去查阅文献，在那里他们只能一张张翻阅目录索引以便从各种满是灰尘的合订卷中找到他们需要的文章。

youdao

It might not seem like much at first -but pretty quickly, you'll find that you can flip back to previous weeks and see how you've improved.

可能最初效果并不明显- - -但是很快，你就会发现和几周之前相比，自己已经取得了明显进步。

youdao

It might not seem like much at first - but pretty quickly, you'll find that you can flip back to previous weeks and see how you've improved.

可能最初效果并不明显- - -但是很快，你就会发现和几周之前相比，自己已经取得了明显进步。

youdao

Flip it around and you'll find the minute tweak that marks it as a US model: the shifting of the Beats Audio logo upwards and, in its former place, the presence of T-Mobile's logo above the speaker grille.

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Flip it over, and you'll find a back that also shares a lot with its E Ink brethren, with a soft-touch feel that's carved out to help you grip the thing.

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The phone included other sensors that let you flip from horizontal to vertical view, find Wifi and connect to a Bluetooth listening device.

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