The most difficult thing in the world of the changeable world remain the same relationship.
这个世界最难的事莫过于在多变的世界里维持不变的关系。
Being settled is a state of mind, it is the constancy of purpose in the changeable world.
“定”是一种境界，是居于多变之中的不动摇。
In the complex and changeable world economical environment, quality of a product has become the crucial factor for enterprise to achieve its success in the fiercer competition.
当今世界经济环境复杂多变，全球性市场竞争空前激烈，产品的质量水平已成为决定企业参与市场竞争成败的关键因素。
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