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汉语拼音：píng liú céng

大气圈中的一层，位于对流层顶部到距地面约50千米的高度范围。层内气温通常随高度的增加而上升，大气平稳，以平流运动为主，能见度好，适合高空飞行。

• Stratospheric air more stable, is a smooth flow of the atmosphere, the stratosphere is called.

  平流层的空气比较稳定，大气是平稳流动的，故称为平流层。

• It was unclear what impact the Asian stratospheric pollution might have on the climate.

  目前尚不清楚大气平流层吸收的污染物会对气候造成何种影响。

• Stratosphere's shipment was but one of many to the humans. I had the foresight to salvage a piece of the MechTech for study.

  平流层把这么多的武器都运给人类，我有先见之明，抢救了一件轴动变形武器，留为研究。

• This model has considered the heat transfer of the hot plate when it is in air, high pressure water and still water.

  考虑了钢板在空气中，高压水及平流层水中不同热交换；

• Reactions between oxygen and ultraviolet radiation from the sun create a layer of ozone throughout Earth's stratosphere (upper atmosphere).

  太阳辐射紫外线和氧反应在整个地球平流层（上部大气圈）内产生一个臭氧层。

• And secondly it will be necessary to get adapted to the cold layers of the stratosphere, to become a cold blooded fish of the air.

  其次有必要适应平流层中的寒冷层次，成为空中的一条冷血鱼。

• Wake turbulence between the two aircraft as well as engine performance and flight control responsiveness in the stratosphere were evaluated.

  两架飞机之间的尾流以及在平流层飞行时的发动机性能和飞行控制响应都进行了评估。

• Aerosols can warm the stratosphere and cool the air below by absorbing energy from the Sun.

  气溶胶可以使平流层升温，并通过吸收太阳能量使得下层气温降低。

• Ozone is one of the major pollutants at the ground level, though a good gas in the stratosphere.

  平流层臭氧有益，近地面臭氧是重要空气污染物。