The Thirty Meter Telescope's massive primary mirror has 492 segments, all perfectly aligned to form a 30-meter (98-foot) light-collecting surface.
30米望远镜的巨型主镜分割成了492块，完美地排列从而形成30米(98英尺)的集光面。
This paper introduces mostly the Alcoa's capacity and product of each segments (especially bauxite and alumina, primary aluminum), the results of operation, merging, acquiring and selling in 2000.
本文主要介绍了美铝2000年各业务板块的产能和产量(特别是氧化铝和原铝)，生产经营结果，合并、收购、转让等资本运营情况。
The characteristics of both periodical and primary congestions were used to identify the key congested segments and intersections.
这两个特征被用于重点拥堵点段的判定。
Aiming at the county distinguishing feature, this paper points out several segments of good course of lectures work done by primary level library.
论文针对县市的特点，指出了基层图书馆做好讲座工作的几个环节。
Aiming at the county distinguishing feature, this paper points out several segments of good course of lectures work done by primary level library.
论文针对县市的特点，指出了基层图书馆做好讲座工作的几个环节。
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