The letters, most of which are undated and not included in the collection that was published in 1994, span more than 20 years and cover a wide range of topics—artistic, literary and surreal.

这些信大多数没有签署时间，也没有出现在1994年出版的书信集里，书信内容涉及的范围很广——艺术、文学、超现实。

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Note: Virtual and physical systems hardware and software span a broad range, so the procedures in this article are meant as a reference guide.

注意：虚拟和物理系统的硬件和软件跨越的范围很广，因此本文介绍的步骤仅作为一个参考。

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These LPARs span the range of environments and application types at UPMC.

这些 LPAR 涵盖 UPMC 中的各种环境和应用程序类型。

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She also points out that Rowling's fans span a range of ages.

CNN: Muggle moms await first adult J.K. Rowling book

The National Library of China (NLC) contributed manuscripts, maps, books, and rubbings of steles and oracle bones that span the range of Chinese history from ancient to modern times.

UNESCO: Communication and Information

Its anchor companies span the range from agriculture and food products (Cargill, General Mills) to medium tech (3M) to aviation (Cirrus Design) to health care (Medtronic) to retail (Best Buy, Target) to a cluster of tech startups in the southwestern suburbs of Minneapolis.

FORBES: Tackling the Michigan Problem