海胆

hǎidǎn - sea urchin

Today a guy from Oxford came to talk about calcium signalling in sea urchins. This is one animal that I didn't learn when I went through my animal-learning stage. It's probably quite useful - I'm sure it's on the menu in China.

针状物精细尖锐的突出物,如海胆的脊椎骨或水晶球
A fine, sharp projection, as a spine of a sea urchin or a crystal.

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