Surveillance and Monitoring: When outdoor temperature is below the freezing point, temperature and air speed should be monitored at least every 4 hours.

温度检测：当室外温度低于冰点时，应至少每四小时检测一次温度和风速。

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Though the low temperature limit has not been tested, we can reasonably deduce that the FOXY Sensor operates successfully well below the freezing point of water.

虽然低温限制未进行测量，我们能适当地推定FOXY传感器在低于水的凝固点的温度下运行也良好。

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The temperature remained below freezing point throughout the day.

全天气温一直在冰点以下。

《柯林斯英汉双解大词典》

"In wintertime, the cliff surface gets so cold that its temperature falls below the freezing point of CO2, which at low pressure goes directly to solid, " said Dr Musselwhite.

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It has a freezing point well below 32 degrees Fahrenheit or zero Celsius and therefore is able to prevent the precipitation that falls into it from freezing on the plane's surface.

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