"齐声欢呼喝彩" can be translated into English as "cheer in unison" or "acclaim in unison".
"Cheer in unison" emphasizes the coordinated and simultaneous act of expressing joy or approval.
"Acclaim in unison" conveys a more formal or enthusiastic approval, often used in contexts like performances or achievements.
Both expressions capture the essence of collective and synchronized applause or acclamation.