Both the theory and the practice show that the parallel electrode source is more practical, while the explosion wire source has a higher efficiency.

理论和实践都表明，平行电极放电震源比较实用，而爆炸丝放电震源效率较高。

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It's indispensable to use the long wire source to overcome the interference of the natural source in most of the electromagnetic methods of exploration geophysics.

在大多数勘查地球物理电磁法的应用中，利用长导线源克服天然场干扰问题是非常必要的。

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The wire could therefore be switched on and off by the external light source.

ECONOMIST: New-age crystals

Unlike earlier solutions -- like Eugene Polley's "Flashmatic" remote -- Robert's remote wasn't prone to interference, didn't require a wire, and, unlike current remotes, didn't require a power source.

ENGADGET: Robert Adler, co-inventor of the TV remote, passes away