The capillary images were projected on a focusing screen. It is of much benefit in observing the dynamic behaviors of the microcirculation continuously and quantitatively.

该装置可将毛细血管的像聚焦在一光屏上，它有利于连续与定量观察微循环的动态特性。

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You simply watch a grid of letters that flashes on the screen, focusing on the letter you want to type.

你只要简单地看着屏幕上闪现的一组字母，集中注意力在你想要输入的字母上。

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Focusing on a computer screen for too long can lead to dry eyes and eye fatigue.

聚焦在电脑屏幕上停留太久会导致眼睛干涩和眼部疲劳。

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It may not quite do that - but the live demo of the new translation service looked very clever, as did the standout eye-tracking feature which enables you to pause a video by simply looking away, then restart it by focusing on the screen again.

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When used for Live View shooting, the camera's bright high-performance LCD screen provides 100 percent coverage, for easy focusing and framing.

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Martin Cuff, an economic development specialist focusing on film, argues that the key is the emotional connection between audiences and what's on screen.

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