Maintenance contracts
[经] 维修合同
🧩 词语组成解析
n. 契约( contract的名词复数 ); 婚约; [法律]契约法; 行贿
🗣️ 情景例句
How big is your family?
你家有几口人？
Do you have an extension?
你有分机吗？
Many firms, for instance, have great difficulty in obtaining technical or scientific books from libraries
比如，很多公司向图书馆借阅科技书籍时感到很困难，