The plant detects the substance and activates an internal signal that causes it to lose its green colour, turning its leaves white.

当植物监测到那些有害物品时就会激发内信号，使叶子从绿色变成白色。

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This dissertation studies a new type of safe system about locomotive in and out section aiming at the present state of internal signal system.

本文针对国内机务段内信号系统的现状，特研究了一套新型的机车出入段安全系统。

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While in loopback mode, driver outputs are internally connected to receiver inputs creating an internal signal path convenient for diagnostic testing.

在回送模式中，驱动器输出在内部与接收器输入相连，建立一个内部信号通路以方便诊断测试。

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VAMP's audiophile-grade, high fidelity DAC processor extracts the digital signal of the iPhone to bypass the iPhone's internal DAC.

ENGADGET: V-Moda VAMP for the iPhone: an analog converter and headphone amp with a $650 pricetag

The call was taken by the Dane County 911 center and an internal investigation revealed the dispatcher did not hear any sounds that would signal an emergency.

CNN: Slain student called 911, but no one came in time

If you crack open your GPS, you could extend the wire between the antenna and the internal antenna, but the loss from the extra wire would degrade the signal.

ENGADGET: How-To: Add your own external GPS antenna