For instance, a thief could place the stolen phone in a signal-blocking phone case that would prevent all electromagneticcommunications from reaching the device.
比如小偷只要把偷来的手机放在一个能阻绝无线信号的手机壳里，就能阻断这部手机的所有电磁通讯。
2
Nissan and Sharp has now integrated these electronic intelligent-key, wireless communications and electromagnetic technologies into the new handset.
日产和夏普已经在手机上采用这些电子智能钥匙，无线通讯和电磁技术。
3
Light is part of the electromagnetic spectrum...wouldn’t it be great to use it for wireless communications?” Professor Hass said.