The currents of air that the walls of the ship direct upwards, as well as in the line of its course, are enough to give the great bird with its immense wings sufficient sustenance and progress.

沿船体的上升的气流和沿航线向前的气流，给这种巨翼大鸟以足够的浮力和推力。

Condensation releases heat, and heat becomes the energy that drives huge upward drafts of air.

凝结释放热量，热量动大量气流上升的能量。

The baby spiders felt the warm updraft.

蜘蛛娃娃们感觉到温暖的上升气流。

From there, they use natural updrafts, also called mountain waves, to soar to the sky.

之后，飞机将利用上升气流飞翔，人们也把他叫作“地形波”。

That's a column of warm, rising air as well.

那也一股温暖的上升气流。

This heats the surrounding pocket of air, giving it lift and sucking more moist air up behind it, which cools and condenses and releases heat, which fuels lift and strengthens the updraft.

这加热了周遭空气，它上升并吸起更多下方湿空气，湿空气凝结又释放热量，持续动并强化上升气流。

And then through all the tiny little perforations, small air bubbles will start to rise towards the surface, which create that upwards current that can lift plastic towards the surface, and then guide it towards the catchment system.

一些小气泡会因压力穿过管子上的微小孔洞，从下而上冒向水面，从而形上升气流，将塑料冲到水面上，然后引到集水系统中。

For instance, stratus clouds-those unlovable, featureless sprawls that give us our overcast skies, happen when moisture-bearing updrafts lack the oomph to break through a level of more stable air above, and instead spread out, like smoke hitting a ceiling.

比如，要水汽的上升气流无法突破上面比较稳定的一层空气，就会像烟碰到了天花板那样向外展开，于就形了层云一那种不大讨人喜欢，毫无特色，弄得天空阴沉沉的云层。

What you're looking at is the peeled back artificial turf that was sucked up by the powerful updraft of this tornado.

你现在看到的被龙卷风强大的上升气流吸走的剥落的人造草皮。

And the great areas of concrete roasting in the sun create thermals, so that, with very little effort, the birds can soar over the city.

烈日下大面积的混凝土散发的热量形上升热气流，游隼不费吹灰之力便可以在城市上空翱翔。

Battling violent updrafts and acid clouds, these non-stick pioneers were swept nearly halfway round the planet.

对抗着上升气流和酸云, 这些不人知的先者已经几乎环绕这颗行星一周。

The more condensation and the bigger the storm clouds grow, the more powerful those updrafts become.

凝结程度越大，并且形风暴的云团越大时，那些上升气流也就越强。

An updraft is also extremely treacherous because it can push an aircraft upward to dangerous altitudes.

上升气流也极其危险，因它可以把飞机推到危险的高度。

We're leaving here on the warm updraft.

“我们在乘着这温暖的上升气流离开这里。

Pilots don't see updrafts on their radars at night, and when a plane hits one, it feels like driving over a huge speed bump at 500 miles per hour.

飞行员晚上在雷达上看不到上升气流，当飞机碰到上升气流时，感觉就像以每小时 500 英里的速度驶过一个巨大的减速。

As warm, humid air at the equator rises, it cools, and–since cool air can't hold as much moisture as warm air–it rains, a lot, enough to make rain-forests.

当温暖潮湿的气流上升，就会冷却，因冷空气不能容纳和暖空气一样多的水分，这时就会下很多足以形雨林的雨。

It's a very special feeling to fly with eagles because I'm really looking how they are thermalling and where they go to soar.

和金雕一起飞翔很独特的体验，因我能亲眼看到它们如何借助上升气流攀升，在哪里展翅翱翔。

Rising air is the first ingredient needed for a tornado to develop.

上升气流形龙卷风所需要的第一个要素。

The most extreme white-knuckle turbulence is super rare, but an updraft is a big air mass — part of a storm or some other weather phenomenon moving upwards.

最令人恐惧的极端乱流非常罕见，但上升气流一种巨大的气团——风暴或其他天气现象的一部分向上移动。

And if the supply of water vapor is much larger, the energy released can produce stratosphere-high pillars of cloud with violent updrafts, fierce electrical storms, and grapefruit-sized hailstones.

如果水蒸气的供给足够多，所释放的能量就可以形平流层高度的云柱，伴随着猛烈的上升气流，造猛烈的雷暴，下起葡萄柚大小的冰雹。