It is shown that the effect of the background on the fluorescence signal increases obviously as the probe distance and can be remitted unambiguously by the background subtraction treatment.

结果表明，随着距离的增大，背景杂光的影响变得非常严重，而减背景处理可以相当有效地使这种影响大大减小。

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Pictures and videos sent back by China's first Mars probe allowed us to see this red planet at such a close distance.

中国首个火星探测器传回的图片和视频让我们在如此近的距离看到了这颗红色星球。

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They may try to distance themselves both from the event in question and even others who probe the event, with subtle moves away and creation of physical and cognitive barriers.

他们也可能试图与被询问的事件和事件调查人保持距离，比如不露痕迹地挪开一些或者制造一些有形的或无形的障碍。

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More recently Galileo, a probe now investigating Jupiter, has been the beneficiary of the long-distance fixers' art.

ECONOMIST: The long arm of the celestial repairman