While each box contains a beacon, the unit only has enough battery power to transmit a signal for 30 days.

虽然每个盒子里都有一个信标，但这个装置的电池只能够传输30天信号。

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Each elemental unit has a simple layout consisting of a rectangular box and a triangular roof.

每个元素单元都有一个包括矩形框架和三角形屋顶的简单布局。

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However, they can provide significant value when the unit tester executes the test using a stubbed-out, black box approach.

然而，它们可以在单元测试人员利用局部的黑盒方法执行测试时提供有意义的价值。

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Each LNG In A Box unit is fully equipped with a gas pre-treatment system, cold box assembly and boil off gas compressor as well as a GE's turboexpander compressor, high-speed reciprocating compressor, electric motor, driver and control system.

WSJ: GE Unveils LNG In A Box(TM) System; Gasfin Selects New Technology for Fueling Stations in Europe

This, in the end, may be the reason Google is letting go (and could also signal that Cisco will soon sell its own TV set top box unit) as Asian competitors may be turning set top boxes into commodities.

FORBES: Selling Motorola's TV Group: a Strategic Mistake for Google?

Merely five days after a listing flyer hit my mail box, the unit was already in contract for the full asking price.

FORBES: Surprise! Some Cities Are Actually Experiencing Housing Shortages