• Using a photometer that's more than three feet in diameter, Kepler is now continuously observing some 100,000 stars located between 600 and 3,000 light-years away.

    利用一个直径超过3英尺光度计开普勒正在不断观察位于600光年至3000光年远的10万颗恒星

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  • The light from stimulating source to the pigment sample and the emitting light from the pigment sample to the photometer are transmitted by optical fibres.

    激发源样品激发以及从样品到光度计发射光均光纤进行传导

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  • Interplanting leaf area index, the daily changes of light transmittance and light intensity in the middle part of the canopy are observed with the LAI-2000 type and photometer.

    采用LAI-2000照度计进行行间面积指数、株间透光树冠中部光照强度变化进行测定;

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  • Interplanting leaf area index, the daily changes of light transmittance and light intensity in the middle part of the canopy are observed with the LAI-2000 type and photometer.

    采用LAI-2000照度计进行行间面积指数、株间透光树冠中部光照强度变化进行测定;

    youdao

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