用连接在光照度计上的光探头测量水面及水底的光照度。

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

youdao

用连接在光照度计上的光探头测量水面及水底的光照度。

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

youdao