Retrieve unconditionally the latest temperature and humidity sensor readings and, during the autumn season, activate external ventilation or heating based on the following conditions.

无条件地获得最新温度和湿度传感器读数，在秋季，基于以下条件激活外部通风或供热。

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Retrieve unconditionally the latest temperature and humidity sensor readings and, during the winter season, activate external ventilation or heating based on the following conditions.

无条件地获得最新温度和湿度传感器读数，在冬季，基于以下条件激活外部通风或供热。

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Retrieve unconditionally the latest temperature and humidity sensor readings and, during the spring season, activate or deactivate the external ventilation based on the following conditions.

无条件地获得最新温度和湿度传感器读数，在春季，基于以下条件激活或取消激活外部通风。

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Last year Dr Smith and Alanson Sample, a researcher at the University of Washington in Seattle, powered a small humidity and temperature sensor using nothing more than the energy gleaned from a television station 4.1km (2.5 miles) away.

ECONOMIST: Monitor