Their closest relatives are the gymnosperms, a group that came before them on Earth.

它们近亲是裸，这是一个在地球上先于它们群体。

Baker said angiosperms are more successful at reproducing than gymnosperms.

贝克说，被比裸在繁殖成功。

Gymnosperms and angiosperms both have seeds.

裸和被都有种。

Gymnosperms usually depend upon the wind for pollination.

裸通常依靠风授粉。

During the Cretaceous Period, many common plants  were gymnosperms or seed-producing plants, like early conifers.

在白垩纪时期， 许多常见是裸或产生种，如早期针叶树。

So, why was this butterfly-lookalike visiting a gymnosperm 165 million years ago?

那么，为什么这只长得像蝴蝶人会 在 1.65 亿年前造访裸呢？

But, for most of the history of land plants, gymnosperms were dominant.

但是，在陆地大部分历史中， 裸占主导地位。

As gymnosperms declined, angiosperms or flowering plants filled the niches  they left behind.

随着裸衰落，被或开花填补了它们留下生态位。

They spread into many ecological niches and replaced the gymnosperms.

它们扩散到许多生态位并 取代了裸。

But the gymnosperms haven’t been totally abandoned by their pollinators.

但裸并没有 被它们传粉者完全抛弃。

Like the scorpionflies and lacewings, these true flies were thriving on the reproductive structures of gymnosperms, not angiosperms.

就像蝎蛉和草蛉一样，这些真正蝇类在裸繁殖结构上繁盛，而不是被。

The sweet pollen drops of some modern gymnosperms still attract pollinating flies and moths.

一些现代裸甜花粉滴 仍然吸引授粉苍蝇和飞蛾。

They're the most diverse group of land plants, with around 300,000 known species, while today's gymnosperms number around 1000 species.

它们是陆生中最多样化一组，已知有约30万种， 而当今裸则有大约1000种。

Like angiosperms replaced gymnosperms, non-avian dinosaurs were largely succeeded by  new kinds of mammals, which began to dominate terrestrial ecosystems.

就像被取代裸一样，非鸟类恐龙在很大程度上被新型哺乳动所取代，并开始主宰陆地生态系统。

Known technically as gymnosperms, they have needle-like leaves which are almost always evergreen and reproduce through exposed seeds nestled within cones.

它们在技术上被称为裸， 有针状叶， 几乎总是常绿，并通过球果内暴露种进行繁殖。

These specialized structures of early gymnosperms weren't big cones like you'd see on a pine tree today.

这些早期裸特化结构并不是像今天松树上看到那种大球果。

For millions of years, gymnosperms  grew in vast prehistoric forests and murky swamps, forming dense yet open ecosystems where reptiles  and amphibians thrived.

数百万年来， 裸生长在广阔史前森林和浑浊沼泽中，形成密集而开放生态系统， 爬行动和两栖动在这里繁衍生息。

As for the gymnosperms, most of them are back to being wind-pollinated, with airborne pollen that gets stuck in pollen drops.

至于裸， 大多数又回到了靠风传粉状态，空气中花粉会粘在授粉滴上。

Gymnosperms don't make nectar, but they do make nutritious pollination drops that are used for trapping airborne pollen.

裸不制造花蜜，但它们会制造有营养授粉滴，用于捕获空气中花粉。

As the angiosperms got their foothold and attracted crossover pollinators like beetles, some pollinators still remained loyal to the gymnosperms.

当被站稳脚跟并吸引了一些跨界授粉者如甲虫时，一些授粉者仍然忠于裸。