You can even use the altimeter to plot barometric pressure over time, which can help you keep an eye on changing weather conditions.

您甚至能用高度计随时绘制大气压力，它能帮助您观察天气条件的变化。

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On Wednesday they were back in operation but with an eye on the weather.

BBC: Schools braced for fresh snowfall

Authorities in Mississippi, Texas and Alabama also began activating storm plans and urging residents to keep an eye on the weather.

CNN: Gustav hits Jamaica; Haiti says 51 dead

Luton Airport said it did not anticipate any further flight cancellations but was still keeping an eye on the weather forecasts.

BBC: Stevenage in the snow