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.

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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.

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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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