The unpredictable weather, towering buildings and dense crowds will be the biggest difficulties to the air echelons.
莫测的天气、林立的高楼和密集的人群将是空中梯队最大的难题。
Dense high-temperature processing of silicon also gives the product a high weather resistance.
高温致密硅的处理也赋予了产品较高的耐候性。
Their short, dense feathers form a waterproof coat, and thick layers of fat keep them from cold weather.
他们短小和紧密的羽毛成为了一个防水外膜，厚厚的脂肪层使得他们能够在冷水中不感觉到寒冷。
Their short, dense feathers form a waterproof coat, and thick layers of fat keep them from cold weather.
他们短小和紧密的羽毛成为了一个防水外膜，厚厚的脂肪层使得他们能够在冷水中不感觉到寒冷。
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