到目前为止，我们仍不清楚是什么导致了这次巨大的停电事故的翻译：To date, it is still unclear what caused the great blackout 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

So far, we still do not know what caused the huge blackout

To date, it is still unclear what caused the great blackout

So far, we still not clear were any have caused this huge power cut accident

So far, we are still not clear what led to this enormous power outage

To date, it is still unclear what caused the great blackout