Measure light intensity on the water surface and at the bottom by a light probe connected to light meter.

用连接在光照度计上的光探头测量水面及水底的光照度。

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Measure light intensity on the water surface and at the bottom by a light probe connected to light meter.

用连接在光照度计上的光探头测量水面及水底的光照度。

youdao