B. External fetal monitoring. The FHR is measured by focusing an ultrasound beam on the fetal heart. The fetal monitor interprets Doppler signals.

外监护。通过集中超声波束于胎儿心脏来描记胎心率，胎儿监护翻译多普勒信号。

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These devices are most effectively used in nulling and beam centering applications where the goal is to maintain or monitor optical alignment by keeping a balanced or null signal.

这种器件最有效地使用于调零和光束置中应用，目标通过保持平衡或调零信号来维护或监测光学器件的对准。

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Faraday Cup, Rogowski coil, Resistive Wall Current Monitor and Bot are familiar diagnostic techniques to measure beam parameters.

法拉第筒、罗科夫斯基线圈、壁电流探测器、磁探针是束流测量中几种常见的方法。

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Packed with speakers, an array of wireless sensors and the ability to send video signals to your TV sans cables, the concept docking station is meant to stylishly hold your KDDI handset (lots of 'em will be compatible in due time) and beam a blown-up version of your phone's UI onto your television or LCD monitor.

ENGADGET: KDDI Polaris Robot concept -- it's like Rolly, but with a purpose (video)