音标：[ik'stenʃәn]
n. 延长, 扩充, 范围, 扩展名
a. 伸缩的
【计】 扩展名, 扩充名
【化】 伸长
【经】 延期
在线英汉词典

extension的短语、例句：

extension n 1 [U] process or action of extending (extend 1,2,3); state of being extended 伸长; 延长; 延展; 伸展; 提供; 给予
The extension of the garden will take several weeks. 扩建花园需要几个星期.
the extension of scientific knowledge 科学知识的普及
the extension of a warm welcome 给予热烈的欢迎. 2 [C] (a) ~ (to sth) added part; addition; enlargement 增加的部分; 增加; 扩大
build an extension to a hospital 扩建一医院
Our extension is nearly finished. 我们的扩建部分已接近完工. (b) ~ (of sth) additional period of time 增加的一段时间; 延长期
an extension of one´s summer holidays 暑假的延长
get an extension (of time), eg for paying a debt 获得延期（如偿债的宽限期）
He´s got an extension to finish writing his thesis. 他获准延期交论文. 3 [C] telephone line leading from the main phone or switchboard to another room or office in a (large) building; its number 电话分机; 分机号码
There are telephone extensions in every office. 每间办公室都有电话分机.
She has an extension in the kitchen and in the bedroom. 她的厨房和卧室都有电话分机.
`Extension 326, please.´ ｀请接326号分机.＇ 4 [U] (medical or fml 医或文) (a) action of stretching out a limb or finger （四肢或手指的）伸展
Extension of the injured arm was painful. 把受伤的胳膊伸展开是很疼的. (b) its position when stretched out 伸展开的姿势
The leg is now at full extension. 现在腿已伸直.