If the integrated parts can not be mobile, it will be difficult to upgrade product specifications, and highly integrated motherboard often requires non-standard chassis.

如果被集成的部件不能被移动，则很难升级产品规格，而且高度集成的主板经常需要非标准机箱。

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Often, project managers don't account for the time needed to upgrade the team to the new necessary skill sets.

通常，项目经理都不会考虑其团队升级到新技能集所需的时间。

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The task is often to build an it system, not just maintain or upgrade it.

这个任务通常是建立一套IT系统，而不是仅仅限于维护或升级。

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Carriers have also looked to reduce how much they're spending to subsidize smartphones for contract customers, in part by trying to limit how often people upgrade to new devices.

WSJ: Verizon Wireless Overhauls Wireless Plans

But smaller, less prominent schools often lack the capital to upgrade their facilities or to market themselves and are being squeezed out.

ECONOMIST: Private education

In many cases airlines will try to find a passenger who is willing to take a later flight, often sweetening the pill with a free upgrade.

BBC: Q&A: Air passengers' rights