The first attempt at virtual reality used head-mounted displays (HMDs).

虚拟现实首次尝试使用了头盔式显示器（HMD）。

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The time delay problem in head-mounted display (HMD) based virtual reality systems is researched.

研究了基于头盔显示器（HMD）的虚拟现实系统中的时间延迟问题。

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In test runs of the device, the depth camera was affixed to a head-mounted rack that is anything but inconspicuous.

在这个设备的测试中，敏感相机被固定在一个不引人注意的头戴式支架上。

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The so-called Red Shirts, supporters of former prime minister Thaksin Shinawatra, have mounted a series of targeted demonstrations, ranging from ritualistic blood curses to head-shaving to noisy parades through the streets of the capital.

VOA: standard.2010.03.27

With plastic intake manifolds and head-mounted injectors, it weighs a scant 234 pounds.

FORBES: How to get 51mpg from an engine the size of a large turkey.

If it finds a matching reference, it'll bring up contextual information that is displayed on the Brother head-mounted display that accompanies the SMI glasses.

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First up is Robopanda, a Teddy Ruxpin-like doll for tots four-and-up that sports "many advanced sensors" along with a head-mounted IR sensor and stereo sound.

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