He made an emotional plea for peace during his speech.

plea 是名词，来自动词 plead（恳求、请求），意思是"恳求、请求"，通常指正式或公开的请求。在句中指"公开呼吁"。 emotional plea 指"充满情感的恳求"，强调请求时带有强烈的情感色彩。