不幸的是，这种配双单人床垫的床售价更贵。
Unfortunately, the twin-mattress solution made it even more expensive.
二位五通电磁阀配双作用式执行器。 二位三通电磁阀配单作用式执行器。
Two five pain with double acting solenoid valve actuator. 2 solenoid valve with three single-action actuators.
布莱尔还当场接受了一个时尚品位测试，为一条灰色短裤和一件套头羊毛衫配一双鞋。
Blair's style notions were put to the test when he was asked to choose a pair of women's shoes to match grey shorts and a woolly jumper.
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