Reliablity and validity are eternal motif of language testing.

摘要信度与效度是语言测试永恒的主题.

DXC based network is an effective method to improve the reliablity of fiber network.

建设以DXC为基础的网络是提高光缆干线传输网生存性、可用性的有效方法.

The advantages of the die are rational design, good reliablity and high economic protential.

该模具设计合理, 可靠性好,经济效益特别显著.