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。
