In Carboniferous forests dragonflies grew as big as ravens.

在石炭纪森林里，蜻长到大得像乌鸦。

Different species of dragonflies can be found near the lake.

靠近潮地方可以发现各种不同蜻蜒。

They are the young stage of dragonflies predators that feed on worms and tadpoles.

它们是蜻幼虫，以蠕虫和蝌蚪为食掠食者。

The eyes of a dragonfly consists of 20,000 tiny telescopes packed together.

蜻眼睛由20万微小单眼排在一起构。

During prehistoric times, two-foot dragonflies did exist, because atmospheric oxygen levels were higher.

在史前时代，因为大中含量较高，所以两英尺长蜻确实存在。

Some insects, such as dragonflies, are nimble enough to cope with the creeping change.

一些昆虫，如蜻，足够灵活，可以应对缓慢变化。

And dragonfly larvae use their butts like aquatic jetpacks.

蜻幼虫把它们臀部当喷背包使用。

Dragonflies were the size of hawks, while some spiders were the size of small birds.

蜻体型和鹰一样大，有些蜘蛛体型堪比鸟类。

Luckily, dragonflies are territorial insects, which always come back on their favorite perch.

幸运是，蜻有自己领地总是回到自己最喜欢栖处。

The volunteers used dip nets to collect dragonfly larvae from their aquatic abodes.

志愿者们使用中采集网从它们生活栖息地收集蜻幼虫。

And in the case of the dragonfly, that's interception.

就蜻而言，那就是拦截。

But freshwater insects, such as dragonflies and mosquitoes, have been growing in number over the years.

但是淡昆虫，如蜻和蚊子，其数量在过去几年里一直在增长。

Dragonflies and swallows and nighthawks seine the air where the minute winged creatures flit out their minute life spans.

蜻、燕子和夜鹰在天空中像围网似地捕食，而极小有翼动物在空中轻快地飞来飞去，顷刻间其想暂生命便结束了。

Dragonflies are the most highly perfected flying machine you can see on this planet.

蜻是整个地球最完美飞行机器。

That's right, Don. Yael, that's nonsense. Making a prediction would involve trigonometry. Dragonflies don't know trigonometry.

没错啊，老唐。 瑶瑶，这就胡扯了。做出预判需要三角学知识，蜻可不懂什么三角学。

This is what my movements probably look like to the dragonfly, giving him lots of time to escape.

我动作在蜻看来很可能就是这样它逃走时间很充分。

In essence, your and my umwelt fundamentally differs from the umwelt of a mosquito or a dragonfly.

从本质讲，你我环境世界本质与蚊子或蜻不同。

So when dragonflies are hunting, they do more than just fly straight at the prey.

因此，当蜻捕食时，它们所做不仅仅是直接飞向猎物。

These are ongoing experiments in which we put living dragonflies in virtual reality.

这些是正在进行实验，我们将活体蜻放在虚拟现实中。

Dragonflies have pretty much the best compound eyes out there with around 30,000 of those little units per eye.

蜻拥有最好复眼，每只眼睛大约有 30000 个这样小单位。