石化系统建设同一般的建设既有相似点，又因其特殊性，又有着不同其他的特点。
Petrochemical system construction with the construction of both the general similarities, but also because of its uniqueness, but also have different additional features.
如“既有与很为相似的朋友，又有与很为不同的朋友”，可以表达。
We have friends similar to us and friends different from us.
因此，这两种不同入射声波的声波反射压力的变化既有不同，又有着相似之处。
The reflected pressure of the fluid is similar between the plane acoustic wave and the point source acoustic wave.
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