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
extension [美 ˌɪkˈstɛn(t)ʃ(ə)n, 英 ɪkˈstɛnʃ(ə)n, ɛkˈstɛnʃ(ə)n] 名词
1.1. extension U (of power, meaning):
1.2. extension U or C (lengthening):
1.3. extension C (appendage):
2. extension C (to building):
3.1. extension 电信 C (line):
3.2. extension 电信 C (telephone):
4. extension U 大学:
extension ladder 名词
在《PONS词典》中的词汇
extension [ɪkˈstenʃən] 名词
extension ladder 名词
在《PONS词典》中的词汇
英语
西班牙语
extension [ɪk·ˈsten·ʃən] 名词
extension ladder 名词
单语范例（未经PONS编辑处理）
This makes the perturbation grow and causes the downward extension of a salt finger.
en.wikipedia.org It was doubled in size in a 1923 extension which was designed to be entirely compatible to the original building.
en.wikipedia.org This implies that any cofibration can be treated as an inclusion map, and therefore it can be treated as having the homotopy extension property.
en.wikipedia.org An extension cord that twists in pain when devices in standby mode are left plugged into it.
www.theatlantic.com The program received a no-cost extension to operate for a fourth year through 2007.
en.wikipedia.org