The main volatile chemical components of RPR are(Z, Z)-9,12-octadecadienoic acid, n-hexadecanoic acid and 2-hydroxy-benzaldehyde.
赤芍主要挥发成分为（Z, Z）-9, 12-十八碳二烯酸，正十六碳酸和2-羟基苯甲醛。
Because RPR is a layer 2 MAC-based technology, it can operate over multiple physical layers, including SONET.
由于RPR是第二层基于MAC的技术，所以它能在多个物理层上工作，包括SONET。
CONCLUSION The mail volatile chemical components of RPR are(Z, Z)-9,12-octadecadienoic acid, n-hexadecanoic acid and 2-hydroxy-benzaldehyde.
结论赤芍主要挥发成分为（Z，Z）-9，12-十八碳二烯酸，正十六碳酸和水杨醛。
CONCLUSION The mail volatile chemical components of RPR are(Z, Z)-9,12-octadecadienoic acid, n-hexadecanoic acid and 2-hydroxy-benzaldehyde.
结论赤芍主要挥发成分为（Z，Z）-9，12-十八碳二烯酸，正十六碳酸和水杨醛。
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