spa urchin

• 海胆

spa urchin的用法和样例：

例句

1. A fine,sharp projection,as a spine of a sea urchin or a crystal.
   针状物精细尖锐的突出物，如海胆的脊椎骨或水晶球。
2. The sea urchin is one of the few marine organisms whose genome has been sequenced.
   海胆是已经进行基因排序的海洋生物中的一种。