Human resources cooperation is highly reciprocal in the PAN-PRD. 泛珠三角区域人力资源发展梯度明显，人力资源合作的互补性强。
The reciprocal nature of the relationship of the key pair makes this unique identification possible through public key cryptography. 密钥对关系中的互补性本质使得通过公钥加密实现这种唯一标识成为可能。
