同声[tóng shēng]
词典speak at the same time：同声。
词典speak simultaneously：同声。
speak at the same time; speak simultaneously
1. \u0064\u0061\u006E\u0063\u0069\u002E\u0039\u0031\u0031\u0063\u0068\u0061\u002E\u0063\u006F\u006D
1. Voci eguali：Mixed [英]混声 | Voci eguali 同声 | Boy's voice [英]童声