上个月经理忙于一个项对营销活动的研究工作的翻译：Last month, the Manager busy with a study of marketing campaigns work 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

Last month, a key manager of the marketing activities engaged in research work

Last month, the Manager busy with a study of marketing campaigns work

Previous month manager is busy with one item to the marketing activity research work

A manager was busy last month to the marketing activities of research work

Last month, the Manager busy with a study of marketing campaigns work