Often, you will only need this in the coldest weather, when the fleece adds extra insulation between your base layer and your outer layer.

通常你只会在最冷的天气才需要这个，羊毛会在你的底层和外套之间增加一个额外的隔绝层。

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Long-term, large-scale trends and the overall statistics of extreme weather events can and should be part of this evidence base.

长期来看，极端天气事件的大规模趋势和总体数据可以也应当成为这类证据基础的一部分。

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However, the unfavorable weather and huge base of snow meant the avalanche risk was too high to try.

然而，糟糕的天气和大量堆积的雪使我们不得不放弃之前的打算。

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At one extreme, it is the provider of relatively uncontroversial weather stats on which other forecasters base their work.

BBC: Flooding in York

The one time decent weather lingered for more than a day, base camp was so crowded that we had to wander around the moraine looking for another spot flat enough to put up a tent.

WSJ: Amid the Perils of Patagonia

Generally held on the sprawling outdoor grounds of the Pentagon, rainy weather pushed the ceremony next door to the Joint Base Ft.

CNN: Panetta gets a send-off but he's not yet out the door