The system consists of a device pair - optical data sender and receiver.

该系统包括一对设备——光学数据发送器和接收器。

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Assistant: What about this pair? They are the "in" things now in optical wear. Try them on.

售货员：这副眼镜怎么样？它们是时下最流行的光学用品，试试吧。

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The attack helicopter, designated Zhi-9W (Z-9W), features a pair of external weapon pylon and a roof-mounted optical sight for target searching and tracking in daylight.

攻击直升飞机指定为直- 9w (Z - 9w)，特征是一对外部挂架和一套顶部安装瞄准具用于昼间目标搜索和跟踪。

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An ardent young heiress named Sophie (Lisa Henni) tells him approvingly, almost worshipfully, that when he looks he truly sees, yet Sophie can't see that the man she's falling in love with is an optical illusion, a pair of eyes reporting to a brain that's unconnected to a heart.

WSJ: Easy Money, Ballplayer: Pelotero, Trishna, Farewell My Queen | A Smart, Dark Thriller From Scandinavia | Reviews by Joe Morgenstern

There's a pair of USB 3.0 inputs, an HDMI port, optical audio and Ethernet connections on the rear, and buttons for power and settings on the front, but you can easily hide the console deep inside your home theater rig -- it can be controlled exclusively with a Android 4.2-equipped smartphone or tablet.

ENGADGET: Samsung HomeSync Android TV box hands-on (video) HD

By selling exclusively online, the company is able to bypass the licensing companies, optical shops and retailers that each carry their own mark-up and can afford to give a pair away as a result.

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