http://www.pons.de/produkte/3-12-517841-X/（牛津大学出版社授权产品）
在《PONS词典》中的词汇
在《PONS词典》中的词汇
单语范例（未经PONS编辑处理）
The habitat consists of heathland and open treeless areas.
en.wikipedia.org Plantings of pines, palm trees, and eucalyptus groves transformed the site from its treeless state.
en.wikipedia.org Many new trees and shrubs were planted in the early 1970s as the suburbs' houses were built around the rather treeless hill.
en.wikipedia.org However, by the mid-1630s the original treeless outcroppings became overpopulated and could no longer support additional settlement.
en.wikipedia.org Various experimental designs are also common, including treeless and flexible panel saddles.
en.wikipedia.org