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1·These ratios register the fluctuations of air temperatures over the seasons and years.

这些比率记录了空气温度随季节和年份的波动。

2·The level of sulfur dioxide gas above Venus's clouds shows large and very frequent fluctuations.

金星云层上方的二氧化硫气体水平显示出巨大且非常频繁的波动。

3·Weighing yourself regularly is a wonderful way to stay aware of any significant weight fluctuations.

定期称体重是一种很好的方法，这能让你意识到任何明显的体重波动。

4·To build up a better picture of fluctuations appreciably further back in time requires us to use proxy records.

为了更好地了解更早时期的波动，我们需要使用代理记录。

5·It is quite possible that these fluctuations, the huge increase and decrease of sulfur dioxide, happening again and again.

很有可能这些波动，二氧化硫的大量增加和减少，一次又一次地发生。

6·One hypothesis is that it's a natural phenomenon, that the starfish naturally undergo population fluctuations following particularly good spawning years.

有一种假说认为，这是一种自然现象；在特别适合产卵的那几年后，刺冠海星自然会经历种群数量的波动。

7·Maintaining this environment is very costly, and recent research shows that even old oil paint is unaffected by wide fluctuations in temperature and humidity.

维护这样的环境是非常昂贵的，而且最近的研究表明，即使是旧的油画也不会受到温度和湿度大波动的影响。

8·There are several hypotheses, including warming or cooling of Earth, changes in seasonal fluctuations or ocean currents, and changing positions of the continents.

有几种假说，包括地球变暖或变冷，季节波动或洋流的变化，以及大陆位置的变化。

9·The researchers pointed out that low-frequency processes, such as fluctuations in stream flow and groundwater levels, would not usually be apparent to human populations.

研究人员指出，低频过程诸如河流流量和地下水水位的波动，通常不会对人类产生明显影响。

10·These factors include the chaotic fluctuations of the atmosphere, the slower but equally erratic behavior of the oceans, changes in the land surfaces, and the extent of ice and snow.

这些因素包括混乱的大气波动、相对较慢但同样不稳定的海洋活动、地表变化，以及冰雪的覆盖范围。

(1)economic fluctuation经济波动

(1)price fluctuation[经]价格起伏，物价波动

(1)voltage fluctuation电压波动；电压升降

(1)temperature fluctuation温度波动；温度涨落

(1)market fluctuation市场波动；市价涨落

(1)speed fluctuation速度波动；速率变动；速度忽高忽低