Older versions required various additional components.

比较老的版本需要各种额外组件。

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Additional components are there to guide your experience.

那里的附加组件用于指导体验。

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And what do you gain by having those additional components to maintain?

拥有那些需要维护的额外组件，你获得了什么呢？

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Everything should function without any infrastructure changes to the roads or expensive additional components in the cars.

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We will provide the additional components and functionality incrementally with the goal of completing the process in the first quarter of 2012.

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Even though adding disks and heads increases the cost of the hard disk drive, in the current environment of higher HDD prices due to shortages from the Thailand floods of 2011 gives some additional leeway for higher prices to pay for the additional components.

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