B2 中高級 4503 分類 收藏
開始影片後,點擊或框選字幕可以立即查詢單字
字庫載入中…
回報字幕錯誤
(Stories from the Sea: How Life Came to Land)
Life for my kind wasn't always this way.
There was a time when no animals lived on land.
All life was in the ocean.
The ocean's where all of us animals got our start,
more than half a billion years ago,
This is where all animal body types -- or phyla, as scientists call them -- first evolved.
You know, there are more than 30 animal phyla,
but only a handful of major ones had what it took to do something completely daring:
step out of the ocean, and on to dry land.
So, which of these land-dwelling phyla first invaded the land?
Was it me and my mollusc friends, with our amazing mantles and single foot?
Perhaps the chordate crowd, with their notochords, segmented muscles and big bony skeletons.
Or maybe those lowly annelid worms, with their powerful ringed bodies.
Or did the Arthropods first make landfall, with their little flexible suits of armor -- their exoskeleton?
Ah, yes. The arthropods.
From crustaceans to millipedes, spiders to insects,
the arthropods outnumber all animals on land.
So what's their secret?
Their exoskeleton is key, but here's the real kicker: jointed appendages.
They're like little living Swiss army knives:
antennae, multiple mouth parts, an obscene number of legs, if you ask me.
There's one group of arthropods -- the insects --
that really rule the land.
Three body parts, six legs, and an annoying tendency to take over.
Sure, they have to molt to grow, but that doesn't seem to pose a problem.
The insects even invented the first wings, and conquered the skies.
Ah, well. So what if arthropods were the first to reach land
and invent flight, a hundred million years before the rest of us?
So what if they pollinate crops around the world,
and make up 75% of all land animal species?
And that for every single human, there's 200 million of them?
Sure, those leggy arthropods may still be in the lead when it comes to conquering land,
but we still rule in the sea.
There are more species of molluscs in the ocean than any other animal phylum.
We're just getting started up here on land.
Besides, the seas are rising. Just give us some time.
Who knows who'll end up ruling this ocean planet?
提示:點選文章或是影片下面的字幕單字,可以直接快速翻譯喔!

載入中…

【TED-Ed】生命是如何在陸地誕生的 How life came to land - Tierney Thys

4503 分類 收藏
VoiceTube 發佈於 2013 年 7 月 7 日
看更多推薦影片
  1. 1. 單字查詢

    在字幕上選取單字即可即時查詢單字喔!

  2. 2. 單句重複播放

    可重複聽取一句單句,加強聽力!

  3. 3. 使用快速鍵

    使用影片快速鍵,讓學習更有效率!

  4. 4. 關閉語言字幕

    進階版練習可關閉字幕純聽英文哦!

  5. 5. 內嵌播放器

    可以將英文字幕學習播放器內嵌到部落格等地方喔

  6. 6. 展開播放器

    可隱藏右方全文及字典欄位,觀看影片更舒適!

  1. 英文聽力測驗

    挑戰字幕英文聽力測驗!

  1. 點擊展開筆記本讓你看的更舒服

  1. UrbanDictionary 俚語字典整合查詢。一般字典查詢不到你滿意的解譯,不妨使用「俚語字典」,或許會讓你有滿意的答案喔