Sea urchins are another example of an echinoderm.

海胆是另一种棘皮动物的例子。

An army of sea urchins is mounting an attack.

一大群紫海胆正在发动进攻。

Sea urchins and sea stars are close relatives.

海胆和海星是近亲。

Sea otters are the major predators of sea urchins.

海獭是海胆的主要捕食者。

Those grubby urchins ran to me and asked for candy.

那群邋遢的小淘气们向我跑过来要糖果.

Prise open the shell to sea urchins , sea urchin eggs is delicious.

将海胆的外壳撬开后,就是美味的海胆卵.

He compares sea urchins to rabbits and other grazers found on land.

把海胆与兔子和其它陆生食草动物作个比较.

Sea urchins can also be used by scientists to detect toxic chemicals.

海胆还可以用于探测有毒化学成分.

But really what we should have said was adult starfish and sea urchins.

但我们要注意的是只有成年海星和海胆才这样。

Sea urchins are found on rocks and in seaweed and sting in the same way.

海胆是上发现的岩石和在海藻和斯汀在相同的方式。