It also focuses on the two key elements which influenced the emergence of the classic Hollywood studio system: the advent of sound and the business ideal of vertical integration.

它还关注了经典好莱坞工作室系统出现的两个关键影响因素：声音的出现和纵向一体化的商业理念。

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There are two choices for dimension keys: you can assign an arbitrary key, or use identifiers from the operational system.

维度键有两种选择：您可以分配一个任意键，或者使用操作系统中的标识符。

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But unlike regular processes, KVM guests contain a nested operating system, which impacts memory overcommitment in two key ways.

但与常规进程不同的是，KVM客户包含一套内嵌的操作系统，它以两种关键方式影响内存超量使用。

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However, closer examination revealed differences between men and women in two key components of the immune system - T-cells, which protect the body from infection, and B-cells, which secrete antibodies.

BBC: Biological clue to why women live longer than men

The fighting ended a week later when the Lebanese government gave in to two key Hezbollah demands -- lifting a government ban of Hezbollah's telecommunications system and reinstating the chief of security at Beirut's airport.

CNN: Lebanon factions reach deal to end crisis

They understand the key issue here: things will only get worse: two-thirds recognize that the problems facing the health care system will affect all of us if they're not fixed.

CNN: Borger: Obama's only choice is to speak out