It can be either mechanical or electronic.

它既能是机械的也能是电子的。

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A document may be signed by handwriting, facsimile signature, perforated signature, stamp, symbol or any other mechanical or electronic method of authentication.

单据可以通过手签、签样印制、穿孔签字、盖章、符号表示的方式签署，也可以通过其它任何机械或电子证实的方法签署。

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An instrument other than a watch for measuring or indicating time, especially a mechanical or electronic device having a numbered dial and moving hands or a digital display.

仪表，钟：除了时钟以外的测量或指示时间用的仪器，尤指一种有数字表盘、移动指针或数字显示的机械或电子仪器。

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In modern times, we mistakenly use the the word in a very limited sense to refer to electronic, digital, or mechanical tools because our thinking about technology is not very innovative.

FORBES: 3 Radical Business Books You Haven't Read. Plus, the Meaning of Innovation.

It also relies on electronic systems rather than hydraulic or mechanical systems to a greater degree than any other airliner.

NPR: FAA Approves Resumption Of Boeing 787 Flights

It also uses electronic systems for most of its functions instead of hydraulic or mechanical systems.

NPR: US Officials Defend Handling Of Boeing 787 Mishaps