These two lines coincide with each other.

这两条线相重合。

Observational studyaims at the approach to a dynamic system whose equation is undeterminable.

该方程在有限时段上采样值与给定序列重合。

Pectose exists in the fleshy pulp of unripe fruit;during the process of ripening it changes to pectin;by cooking, pectin is changed to pectosic acid, and by longer cooking to pectic acid.

重合果胶存在于未成熟果肉浆中，在成熟过程中它变成胶质，在烹饪时胶质变成重合果胶酸。