Characters cannot be entered directly into a document because of input device limitations.

因为输入设备的限制，字符无法直接输入文档。

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With the present method, device limitations are alleviated and processing time reduced compared to traditional techniques.

与传统方法相比，该方法不仅对设备的限制更小，而且运算速度更快。

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This principle assumes existence of a machine that is connected to both the lightweight device and the Jini network to overcome limitations such as not being able to download code.

该原则假定存在这样一种机器，该机器既与轻量级设备又与 Jini 网络连接以克服诸如不能下载代码之类的限制。

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Plastic Logic's device has similar limitations.

FORBES: Breakthroughs

For that reason you may decide that a tablet, and especially the iPad or even the new Nexus 7 tablet (if you have a WiFi connection), is a far better choice as a communications tool when you are overseas if you do not need the convenience of a smaller device with its obvious limitations as far as screen size.

FORBES: Is The iPad Better Than A Cell Phone For Global Roaming?

And, as we've seen by now, there are serious limitations to this device -- namely its price, image quality and battery life -- that may prevent that from happening.

ENGADGET: Samsung Galaxy Camera review: a 21x compact shooter brought to life by Android