Without some moisture already in the system, and without the right clouds to seed, there is little that scientists can do to induce rain.

如果云中没有一定的湿度，没有适合的云来作催化，科学家就很难引发降雨。

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The system could induce multi-channel vibration acceleration signals and complete signal filting, acquiring and analysis processing.

该系统能够感应多路振动加速度信号，同时完成对信号的滤波，采集和分析处理。

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Certain chemicals can induce undesirable changes in the nervous system.

有些化学物质能在神经系统中引起不良变化。

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Changes in electric use by demand-side resources from their normal consumption patterns in response to changes in the price of electricity, or to incentive payments designed to induce lower electricity use at times of high wholesale market prices or when system reliability is jeopardized.

FORBES: America's Smartest Power Grid