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
在《PONS词典》中的词汇
单语范例（未经PONS编辑处理）
Pine and pine-oak forests, at a height from 1600-2800m have evergreen trees 25-40m tall, with grasses dominating the lower stratum.
en.wikipedia.org There are a number of principles that are used to explain the appearance of stratum.
en.wikipedia.org They penetrate the epidermis and end in the stratum granulosum.
en.wikipedia.org The pronunciation is most similar to that of the dialects from the first stratum.
en.wikipedia.org If we stopped at this first stratum, such a picture could only be perceived as a painting of 13 men seated at a table.
en.wikipedia.org