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B1 中级 英语 4:16 Educational

Crabs Trade Shells in the Strangest Way | BBC Earth

BBC Earth · 28,729,595 次观看 · 添加于 3 周前

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B1

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字幕 (34 片段)

00:00

Hermit crabs use abandoned seashells as mobile homes.

00:07

As a crab grows, its shell becomes an ever tighter fit.

00:12

So, eventually, a crab needs to move in to a bigger one.

00:17

Suitable empty shells are few and far between...

00:21

And this one is far too spacious for this crab.

00:30

But instead of continuing its search, this small crab settles down to wait.

00:46

Other crabs, also looking to upgrade to a bigger home,

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