It is only when you get to the leaf level elements that you can start mapping to columns in databases.

只有展开到枝叶层次的元素，你才能开始把它映射到数据库的列。

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The parent unique ID for a calculated member can be any member on a non-leaf level from the same dimension.

某个计算成员的父计算成员的唯一ID可以是相同维度的非叶级上的任何成员。

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The pages in each level of the index, including the data pages in the leaf level, are linked in a doubly-linked list.

索引中每个级别的页(包括叶级别的数据页)链接在一个双向链接的列表中。

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"This technology should provide an opportunity to see parts of the field even down to the leaf level, " said Phil Hamm, director of the Hermiston Agricultural Research and Extension Center at Oregon State University.

WSJ: Farmers Experiment With Drones

In addition, a new lower priced entry-level LEAF S grade joins the previous SV and SL grades, while an array of feature enhancements are added to the LEAF SL grade, including leather-appointed seating and 17-inch aluminum-alloy wheels.

ENGADGET: Nissan starts US production of 2013 Leaf, vows faster charging and a lower entry price

Cars bought with leased batteries will be known as 'Flex' models and buyers will be able to get behind the wheel of an entry-level Visia LEAF .

ENGADGET: New Nissan Leaf comes to the UK with battery leasing option, extended range