http://www.pons.de/produkte/3-12-517841-X/（牛津大学出版社授权产品）
英语
西班牙语
在《PONS词典》中的词汇
英语
西班牙语
在《PONS词典》中的词汇
单语范例（未经PONS编辑处理）
When they are old enough to fend for themselves, the parents will deposit them on the same sea urchin they are currently living in.
en.wikipedia.org She slips and falls into a bed of sea urchins, where she finally dies from the pain and poison.
en.wikipedia.org In sea urchins, the block to polyspermy comes from two mechanisms: the fast block and the slow block.
en.wikipedia.org The diet of this species consists of invertebrates such as various molluscs, crabs, sea urchins, and cunjevoi.
en.wikipedia.org His background has yet to be fully explained, but he seemed to be a street urchin before joining the military.
en.wikipedia.org