Most handheld devices have their own standards to deliver data over data channels.
大多数手持设备有它们自己的标准用来在数据通道上传送数据。
The interceptable nature of wireless signals and the limited memory and computing power of most handheld devices leaves wireless systems dangerously vulnerable to data theft.
无线信号的可截取本质以及大多数手持设备有限的内存和计算能力，使无线系统极易受到数据窃贼的攻击。
The designers had to create designs for a handheld tablet computer, with pen input. Most of them had never designed a computer before.
设计师们需要创作一种手持式笔输入平板电脑的设计，他们中的大多数甚至从未设计过电脑。
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