I have made an oral report to the manager.

我已经向经理作了口头报告。

He gave us an oral report after inspecting the factory.

视察了那家工厂后，他给我们作了口头汇报。

This does not make the briefing, but an oral report to the leadership.

这并不使简报，但口头报告的领导。

After I made observations for a week, Mr. Hobbs asked me for an oral report of my findings.

我观察了一个星期后，霍布斯先生便要我就调查结果作一个口头汇报。

The performance declined with the increase of the output time in oral report, but not in writing.

但在口头报告中，输出时间增加的同时伴随着记忆成绩下降，而书写报告的记忆成绩不受影响。