首先，不得不说的是你必须要仔细准备好你演奏所需要的一切材料。

First, it goes without saying that you must carefully prepare the materials you are going to play.

youdao

首先，不得不说的是你必须要仔细准备好你演奏所需要的一切材料。

First, it goes without saying that you must carefully prepare the materials you are going to play.

youdao