这些联盟已经确保了半个多世纪的地区和平与安全，为该地区引人注目的经济崛起构建了有利的环境。
They have underwritten regional peace and security for more than half a century, shaping the environment for the region's remarkable economic ascent.
这种阀门的进口和阀体为一件式铸件，确保了阀瓣，阀座和芯轴的对齐和平稳运动。
The valve inlet and body are one integral casting assuring proper alignment of disc, seat and spindle for smooth action.
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