convenient/k?n'vi?ni?nt/adj.
[双解] easy, useful or suitable for a particular purpose 方便的；近便的
[语块] make our lives more convenient 让我们的生活更便捷
cash/kæ?/n.
[双解] money in the form of coins or notes and bills 现金；金钱
[语块] cash on delivery 货到付款
update/??p'deIt/vt.& n.
[双解] make sth more modern by adding new parts 更新，向……提供最新信息； 更新，最新消息
[语块] updated information 更新后的信息
database/'deIt?beIs/n.
[双解] a collection of data that is stored in a computer and can easily be used and added to 数据库；资料库
[语块] database system 数据库系统
