白色的痕迹疑似飞机留下的凝结尾迹或飞行云，但它们实际由轮船留下。
The white trails look vaguely like the condensation trails, or contrails, left behind by airplanes, but they actually result from ship exhaust.
2001年9月恐怖袭击后经过美国的民航因为缺少含硫的飞行云而导致了机内乘客体温明显上升。
When civilian flights over the United States stopped in the wake of the terrorist attacks of September 2001, the lack of sulphur-laden contrails led to a perceptible rise in temperature.
就像自然的卷云一样，飞行云也会阻隔从地球表面散发出来的红外辐射，因此飞行云造成的覆盖面增加会加强云层引起的气候变暖。
Just like natural cirrus clouds, contrails block infrared radiation emitted from Earth's surface, and the increased coverage provided by contrails boosts cloud-induced warming.
这些所谓的“飞行云”不过是飞机尾气中的湿气冷凝而成的云状微型冰晶颗粒，尽管其中有些会很快蒸发，但是很多会逗留数小时，并弥漫天空。
Although some so-called contrails, which are simply clouds of tiny ice crystals condensed from the moisture in aircraft exhaust, evaporate quickly, many linger for hours and spread across the sky.
届时如果火山灰云飘向另一个方向，飞机可能会被指示绕开或在其上方飞行。
If the ash cloud were to drift in another direction, flights could be sent around or above it.
几天前，我舒舒服服地在一朵云里飞行，欣赏着天上的景色。
A few days ago, I was flying comfortably in a cloud, enjoying the view from the sky.
届时如果火山灰云飘向另一个方向，航班将可以在其周围或上方飞行。
If the ash cloud were to drift in another direction flights could be sent around or above it.
研究者称，飞机飞行将云温推至临界点以下，为那些过冷的液态水提供了云形成的冰颗粒，使其凝聚冻结。
As planes push cloud temperatures past the tipping point at which supercooled water freezes, the aircraft "seed" the clouds with ice particles, the study says.
该工程将使用雷达、热气球与大气层飞行器来研究另一种高端云的作用，其名为卷云-它是在暴风雨出现时从其顶端意外形成的。
It will use radar, balloons and aircraft to look at the role of another sort of high-altitude cloud: cirrus clouds, which get spun off the tops of storms.
目前，火山灰仅导致一些短距离的国内航班延迟；大型飞机可以在火山灰云上方正常飞行。
So far, the ash has only deferred some small domestic flights; larger planes are able to fly over the cloud.
当低垂的云层被岛屿一类的物体所阻碍时就会形成云街，飞机在飞行时机翼后方的气流也会形成类似的漩涡。
Cloud streets form when low-lying clouds are interrupted by an object such as an island. Similar patterns occur in the wind flow downstream of airplane wings.
正如雷恩·宾厄姆在最后所领悟到的，如果你独自一个人在云端飞行，你可能会在空气稀薄、夜色笼罩的云间迷失自己的航向。
As Ryan Bingham discovers, if you fly alone, you may eventually drift off beyond the clouds, where oxygen is scarce and the sky turns dark.
对流层上面，淡蓝色有白色云的是平流层，飞机飞行所在的地球大气层，某些顽强的菌类在这里漂浮。
Above the troposphere, seen as a light blue band with white clouds, is the stratosphere, part of the Earth's atmosphere where airplanes fly and some hardy bacteria float.
还有一次事故也是发生在上世纪八十年代，当时英国航空公司的一架波音747客机也是飞入尘云之中，沙砾全都喷在了挡风玻璃之上，飞行员只能面朝侧窗才将飞机安全着陆。
In another incident in the 1980s, a British Airways 747 flew into a dust cloud and the grit sandblasted the windscreen. The pilot had to look out a side window to land safely.
现在，冰微观物理学家安德鲁·海明斯菲尔德（Andrew Heymsfield）和他的同事们已经发现飞机的飞行确实能形成这样的怪云。
Now, ice microphysicist Andrew Heymsfield and colleagues have found that aircraft really can create the odd clouds.
云街-积云借助风势像“街道”样排列成行。是极佳的越野飞行条件。
CLOUDSTREET - cumulus clouds aligned in "streets" by wind. Excellent for long cross-country flights.
飞机在云下飞行。
飞机在云上飞行。
在涉及使用飞行坐骑探索云的国度的超长任务之后，术士可以召唤彩虹爱心熊。
After a long quest involving your flying mount and exploring a new kingdom in the clouds, warlocks can summon Rainbow Bears-that-Care.
那架飞机穿云飞行。
这次飞行未能进行播云作业。
自从艾雅法拉火山爆发后，一种新的可视化系统应运而生。航空界被该系统上火山灰云的图像震撼，建立了“危机单元”并变更飞行计划。
Transfixed by images of the ash cloud on a new visualisation system created for the purpose since Eyjafjallajokull's eruption, they set up a "crisis cell" and sent out changes to flight plans.
飞机正在云上飞行。
当红外预警系统对低空飞行的运动目标进行检测时，由于云杂波的存在，系统的检测性能会受到严重影响。
When infrared warning system detect moving objects in low altitude, detection performance will decrease significantly due to the cloud appeared in the image.
保持在云外飞行。因为云里可能有另一架相反方向的飞机。
Stay out of clouds. The silver lining everyone keeps talking about might be another airplane going in the opposite direction.
在距离木星最近时，“朱诺号”将在这个巨大行星上空5千公里的高度飞行，非常接近木星上空浮动的厚云。
At its nearest approach, Juno will fly a 5,000 kilometers above the gas giant, nearly skimming its dense, swirling cloud tops.
在距离木星最近时，“朱诺号”将在这个巨大行星上空5千公里的高度飞行，非常接近木星上空浮动的厚云。
At its nearest approach, Juno will fly a 5,000 kilometers above the gas giant, nearly skimming its dense, swirling cloud tops.
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