And the hack only seems to work on plastic keypads — metal returns too much heat noise for the IR camera to reliably discern with keys were just pressed.

而且黑客似乎只能在塑料键盘上运用这个方法，因为金属会反射出大量的热量干扰波，从而使得红外摄相机无法准确识别。

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This hardly ever happens out of the blue: there are usually warning signs such as noise, vibration or heat.

机器是不可能突然故障的：通常机器在故障前会有告警信号，例如噪音、振动或发热。

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At this scale, noise and heat are essentially indistinguishable, manifesting themselves as vibrations in the lattice of atoms forming the material from which the chip is carved.

在这个尺度下，噪音和热根本分不开，都表现为雕蚀芯片的材料的晶格原子的震动。

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Along with electricity, the diesel generators create heat and noise that can be detected by the enemy.

FORBES: Don't put one of these in your garage just yet.

Since the room is small, having low heat and noise output is important, but these kinds of intangibles are difficult to tell from reading a spec sheet.

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The SanDisk Extreme SSD consumes 30 percent less power than a hard disk drive while generating less heat and noise, making it an ideal solution for notebook users who want to maximize their battery life while computing on the go.

ENGADGET: SanDisk launches Extreme SSDs: $190 for 120GB, $400 for 240GB