我们首先应当做的是仔细调查火灾的原因.的翻译：First of all, we should do is to carefully investigate the cause of the fire. 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

We should first do is to carefully investigate cause of the fire.

First of all, we should do is to carefully investigate the cause of the fire.

We first should treat as are the careful investigation fire reason.

We should first do is carefully investigated the cause of the fire.

First of all, we should do is to carefully investigate the cause of the fire.