增速齿轮箱在运行中既要承受季节变化时温差带来的恶劣环境，更要承受风场风速的随机变化所产生的变载荷。
During the operation, the gearbox is not only enduring the bad conditions due to the temperature varying when season changes, but also enduring the dynamic loads caused by the random wind speed.
在现实生活中，我们每天购买和烹饪新鲜食物，或只暂时将剩余的蔬菜放入冷冻箱我们已经在在季节中脱化并烤好馅饼。
In an ideal world, we would all buy and cook fresh food every day, pausing only to take from our freezers the surplus veg we had blanched in season and perfect pies we'd baked ourselves.
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