Some functional products such as apparel and electronic devices cannot be tried or tested online.

许多功能性产品，例如衣服、电子产品无法在网上试穿或是试用。

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Or tested a campaign so briefly, because you had little confidence in yourself that you could make it work?

或者因为对自己能否让测试卓有成效缺乏信心，所有就很简单地对广告进行了一番测试？

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The flight compartment system indicator lights may be dimmed or tested by the use of a light switch located on the center instrument panel.

驾驶舱指示器系统的灯光可通过中央面板上的“灯光”开关来调暗或测试。

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If they had, they would have been tested to see if they needed treatment to prevent an infection like H.I.V.or hepatitis.

VOA: special.2010.02.10

Cloves were the most effective at calming inflammation of any spice or herb they tested.

VOA: special.2010.06.01

Developing such a reactor could take a long time because none have been built or tested yet.

BBC: China and Bill Gates discuss nuclear reactor plan

As well, actual systems or tested theories on leadership are difficult to find.

FORBES: The End of Leadership--at Least As We Know It!

We have reviewed or tested nearly every type of single-use hot cup on the market, but a viable alternative does not yet exist.

FORBES: The Final Year Of Mayor Bloomberg's Term Is Poised To Be The Most Dangerous