其中最准确可靠的方法是分别测定水面以上0.8米处的风速和氨的浓度，以计得氨挥发量。
The most accurate and reliable technique involved the measurements of wind speed and ammonia concentrations in the atmosphere at 0.8 m above the floodwater surface.
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.
数以千计的人在意大利北部登上了艺术家克里斯托·贾瓦切夫的最新作品，抓住“在水面漫步”的机会。
Thousands of people stepped out onto artist Christo Javacheff's latest work in northern Italy, seizing the chance to "walk on water".
数以千计的人在意大利北部登上了艺术家克里斯托·贾瓦切夫的最新作品，抓住“在水面漫步”的机会。
Thousands of people stepped out onto artist Christo Javacheff's latest work in northern Italy, seizing the chance to "walk on water".
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