不可數名詞.意為擴大,擴展.如醫院學校等的擴展.eg"The rapid expansion of the university has caused a lot of problems.a這所大學急速擴展,引起了不少問題.
extension
可數名詞.
(1)(建築物的)具體所擴建的部分eg"They are just opened the hospital extension.醫院的擴建部分剛剛啟用.
(2)額外期限,如將做某事的期限延長,即額外期限.eg"I have applied for an extension to my work permit.我已申請把工作許可證的期限延長.
(3)電話分機.eg"what is your extension number?妳的分機號碼事多少?