[计]?区保留
... altitude reservation 飞行高度预留; 高度保留 bandwidth reservation 带宽预约; 频宽保留 block reservation 区保留, 程序块保留 ...
?程序块保留
block reservation 区保留, 程序块保留...
Restaurants use an electronic reservation book, and customers have access to its full inventory (though a block of tables can be set aside for unannounced regulars and celebrities).
CNN: Online restaurant reservations really do work
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