1. THE world owes much of its beauty to cloudland. The unchanging blue of the Italian sky hardly compensates for the changefulness and glory of the clouds. 云彩点缀了世界的美丽，天上如果永远蔚蓝一片，缺少了变幻多端的云彩的美景。
2. And it also makes a detailed analysis of the problems of uncertainty, complexity and changefulness in experimental data, and puts forward some relevant solutions. 并对试验数据的多变性、复杂性和不确定性问题，进行详细分析和提出具体解决措施。
3. When we analyze music works, we cannot ignore it for its shortness and changefulness. We should take a strict and scientific attitude and method towards analyzing and studying it. 所以在作品分析中，我们不能因为它短小、多变而忽视它，而要以严谨的态度与科学的方法对它进行分析与研究。
英英解释
n.
1. the quality of being changeable and variable
