The use of commercial devices for reducing radiofrequency field exposure has not been shown to be effective.

使用商业装置来降低射频场接触量，并无证据证明是有效的。

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Relationship between electromagnetic field exposure and dementia: a population-based case-control study.

电磁场暴露与痴呆：基于人群的病例对照研究。

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Conclusions Radical resection of low rectal cancer with elevating perineum method would significantly improve operative field exposure.

目的探讨改善显露低位直肠癌根治切除术中的手术视野的方法。

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Experience in the field, or exposure to field-based operations, is desirable.

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The recording unit features a 2-inch LCD screen to view footage in the field, edit video and make exposure control adjustments.

ENGADGET: Rugged POV.HD video system captures 1080p through anything, for a price

At very high doses, exposure to a magnetic field can cause the muscles to twitch and some people have reported feeling dizzy or sick when moving their heads quickly around a high-field magnet.

BBC: NEWS | Health | Planned scan-limit delay welcomed