More importantly, it can be expressed as "What's even more important is" in English.

What is more important to say.

It is more important to say it in English as "It is more important that."

英語中表達“更重要的是”常用的是 "What's more decisive" 或者 "What's of greater importance"，以保持表達的正式性和準(zhǔn)確性。
在口語中，一個簡略而自然的表述可能是 "The most crucial thing" 或者 "What stands out the most"，這樣的說法更為口語化，適合日常對話的親密和隨意氣氛。

理解并恰當(dāng)?shù)胤g文化差異，確保語境和語義的準(zhǔn)確性。