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
西班牙语
英语
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）
They call upon casual collectors, hoarders, and occasionally people who have inherited overwhelming collections of apparent junk.
en.wikipedia.org He had no deputies but could call upon the militia for help when so required.
en.wikipedia.org Budding entrepreneurs without their own pool of mentors to call upon often end up turning to government-funded services to get the tutorage they require.
www.startupsmart.com.au They then call upon their ancestors to join them in this celebration, which involves line dancing, the bunny hop, the twist, and rigor mortis.
en.wikipedia.org Nearby stood a vast crowd of civilian on-lookers, who began fraternizing with the rebels, but whom the leaders of the revolt did not call upon to participate in the action.
en.wikipedia.org