"what is more" in Chinese (Simplified)
此外更重要的是
Definition
用来在前面说过的基础上补充更多信息，通常强调一个更重要的观点。
Usage Notes (Chinese (Simplified))
“What is more” 多用于正式或书面语中，强调补充更重要的信息。口语中常用“also”、“plus”。
Examples
The bus was late. What is more, it started to rain.
公交车迟到了。**此外**，还下起了雨。
She speaks three languages. What is more, she writes poetry.
她会说三种语言。**更重要的是**，她还写诗。
His idea is interesting. What is more, it could save money.
他的想法很有趣。**此外**，还可以省钱。
I was really tired when I got home. What is more, the power was out.
我到家的时候已经很累了，**更糟糕的是**停电了。
Tickets are expensive these days. What is more, they're hard to find.
现在门票很贵，**更重要的是**很难买到。
He not only fixed my car, but what is more, he did it for free!
他不仅帮我修好了车，**更重要的是**，还是免费的！