Police are investigating into what caused the incident.

警方正在就事故原因展开调查。

So you and your team went and investigated a little bit more into why costs are so high.

所以你和你的团队去调查了为什么成本如此之高。

Indeed, we are ready to investigate the Burisma case and interference from the Ukrainian side into U.S. elections in 2016, if it happened.

确实，我们准备调查Burisma一案，以及乌克兰干预2016大选一事，如果这确实发生了。