警察调查这个案子已经有三周了的翻译：Police investigating the case has been three weeks since 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

Police investigating the case have three weeks of

Police investigating the case has been three weeks since

The police investigated this case already to have three weeks

Police investigating the case has already had 3 week

Police investigating the case has been three weeks since