n. idler
misc. back gear ; minute wheel
当一个表空间跨多个容器时，会使用某种轮循方式(在一些名为扩展的页面组中)将数据写入分配给该表空间的每个容器。
When a table space spans multiple containers, data is written in a round-robin fashion-in groups of pages called extents-to each container assigned to that table space.
简单来说，美人奴跨界敞篷车就是一款四轮驱动的美人奴跨界车，只是用自动折叠的软顶取代了金属的硬顶，而且取消了两个后方车门。
In simple terms, the Murano CrossCabriolet is an all-wheel-drive Murano crossover in which an automatic folding fabric top replaces the metal roof, and the two rear doors have been eliminated.
本文主要研究话题的跨话轮推进问题。
The dissertation is mainly focused on the study of topic-advance in trans-turn speech.
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