1 [T] to make sth longer or larger (in space or time) 使(在空间或时间上)延长或扩大:
Could you extend your visit for a few days?你此行可不可以延长几天?We're planning to extend the back of the house to give us more space.为了地方大一点,我们打算把后屋扩建一下。Since my injury I can't extend this leg fully (= make it completely straight).我受伤以后这条腿伸不直。
2 [I] to cover the area or period of time mentioned (指面积或时间)延伸,延续:
The desert extends over a huge area of the country.沙漠延伸到这个国家的大片地区。The company is planning to extend its operations into Asia.公司计划把业务扩展到亚洲。
3 [T] (formal 正式) to offer sth to sb 予以;给予:
to extend hospitality/a warm welcome/an invitation to sb给予某人友好款待/热烈欢迎/邀请