By analysing frequency spectrum in this paper, we can understand that when NRZ code be transferred into RZ code of 1/2 mark-to-space ratio, the timing clock can be obtained at largest power.

本文通过对NRZ、RZ伪随机码序列进行频谱分析，得知当NRZ码变换成码元占空比为1/2的RZ码时，所提取出的定时时钟功率最强。

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Then, use a simple system of symbols to mark off 4 different information types in the column space left in the margin.

然后，在你的第一列空栏中使用不同4符号为4不同的信息类型做标记。

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Space mason jars evenly on wooden board, and mark placement with a pencil in order to design and measure around.

把梅森罐平放在旧木板上，按你的喜好量好罐子摆放的位置，用铅笔做标记。

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Microsoft recently launched Office 365, a web-based productivity software product, to mark an entry into the fast-growing cloud-computing space.

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According to Mark Matney of Lockheed-Martin, who works at the Orbital Debris Programme Office at the Johnson Space Centre in Houston, Texas, shielding is an increasing influence on satellite design.

ECONOMIST: Orbital debris

Seemingly without breaking sweat, Spurs' second goal arrived on the half-hour mark when Jenas found Keane in space on the left-hand side of the area and he ran on to slot home past the on-rushing goalkeeper.

BBC: Robbie Keane scores Tottenham's second goal