investigate at first hand的用法和样例:
例句
- These direct investigations aim at addressing problems at a higher level by adopting a proactive and preventive approach.
进行直接调查的目的,在于以积极主动的态度,从较高层次着手解决问题。 - Reports of all direct investigations completed are available for public scrutiny at the office's Resource Centre.
已完成的直接调查报告均存放于公署的资源中心,欢迎市民索阅。