By adopting the method, the eye-observation visual Angle can be accurately measured to realize applications of effect evaluation such as audience ratings survey, outdoor advertising and the like.

可以实现较精确地测量人眼观察视角，以实现收视率调查和户外广告的效果评价等应用。

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In the 1980s molecular and genetic analysis was introduced, enabling species to be identified by their DNA rather than visual observation.

1980年分子学和基因分析的出现，可以通过物种的DNA而不是通常的观察来鉴别他们。

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Suttles said BP's official estimate is based on the visual observation of oil flowing from the barrel, and "how much oil is on top of the sea".

Suttles说BP的官方估计是建立在从桶中流出来可见的原油上的，还有“多少油是浮在海的表面的”。

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They proclaimed the observation as the first visual - albeit indirect - proof of a planet outside our Solar System.

BBC: We saw it too, say astronomers