Dr Zahnle and his colleagues show that a rapidly fluctuatinglevel of methane is an even more extraordinary claim than has been widely appreciated.
Zahnle博士和他的同事展示了频繁变动的甲烷含量，这个曾经被广泛认为是伟大的论断。
2
Under the fluctuating international situation, both sides should build up mutual trust, expand cooperation and raise bilateral relations to a new level.
在当前复杂多变的国际形势下，双方应该进一步增加互信、扩大合作，将两国关系提高到新的水平。
3
However, this is just an overall and average change trend, and in real application, the overconfident level of partners would show a trend of fluctuating downward.