pay off付清, 还清
例句：You must pay off your old loan before you can obtain a new one.
你必须还清旧账, 然后才能再借款。
2. What we need to focus on are some projects and some areas.
focus on集中于
例句：Many firms are focusing on increasing their markets overseas.
许多商行都专注于扩大国外市场。
3. Some analysts attribute heavy local government debt burdens to the heavy reliance on land sales to support GDP growth.
attribute to把某事归因于某人〔某事〕
例句：He attributes his success to working hard.
他认为他的成功是艰苦工作的结果。
