彼(かれ)は早口(はやくち)なので、電話(でんわ)では聞き取(きと)りにくい。

He speaks so quickly that he is difficult to understand on the phone.

早口(はやくち)で話(はな)すと、相手(あいて)に内容(ないよう)が伝(つた)わりにくい。

When you speak too quickly, it is difficult for the other person to understand what you mean.

司会者(しかいしゃ)は早口(はやくち