连票中的最小连结组合。由两枚上下或左右相连在一起的邮票所组合的连票,是连票中最常见的相连形式:按其排列形式,分为横双连和直双连。
命令行中的双连字符把dsh命令本身的选项与要运行的命令分隔开。
The two dashes in the command line separate options for the DSH command itself from the command to run.
此外, 《99美分》系列中的双连画版创作于2001年,与第一版单幅作品(上图)时隔两年,而距离他90年代的重大作品集更是遥远。
Moreover, the diptych version of “99 Cents” was made in 2001, two years after the original single image (pictured above), and well after his seminal compositions of the early 1990s.
这些研究成果对双连拱隧道的设计与施工具有重要指导作用。
The results can offer references to the design and construction of double-arch tunnel.
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