Valid physician practice certificates 持有有效的医师执业证
Accountant's practice qualification certificates 有会计从业资格证书 ; 会计从业资格证
Practice certificates: internal control controlled, it will be strong, losed control then weak, not controlled then disorderly.
实践证明：内部控制得控则强、失控则弱、无控则乱。
And the practice certificates that this system can meet the needs of multimedia centralized control because of its perfect functions, reliable performances and easy expansion.
实践证明，该系统功能完善、性能可靠、易于扩展，完全能满足多媒体集中控制的需求。
Mind that self-signed certificates are considered bad practice for production servers and certificates signed by a CA should be used instead.
要记住，对于生产服务器，使用自签署的证书是不好的做法，应该使用由 CA 签署的证书。
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