One of the primary uses of sequence diagrams is in the transition from requirements expressed as use cases to the next and more formal level of refinement.
序列图的主要用途之一，是把用例表达的需求，转化为进一步、更加正式层次的精细表达。
2
If the sequence reverses, you'll get an error when executing the transition of MathService (SV) (Figure 12).
如果顺序颠倒的话，那么在执行MathService (SV)转换时会得到一个错误(如图12所示)。
3
Integrated information about geology, geophysical and assaying, study structural sequence and sedimentary system of transition period of fault sag in Jiyang depression.