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。

youdao

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。

youdao

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。

youdao

Weather forecasts called for dense fog Wednesday morning, and McGlamery said motorists reported smoke across the highway.

NPR: Authorities: 4 Dead In Fiery Highway Crash In Ga.

The area was under a dense fog advisory at the time of the pileup, said Laura Belanger, a meteorologist at the National Weather Service in Peachtree City.

NPR: Authorities: 4 Dead In Fiery Highway Crash In Ga.