将大型触摸屏、投影仪和扬声器系统合在一个便携包中,获得完整的交互式白板功能。
It was easy enough to get rid of him-my father offered him a speaker system-but I'd never seen my mother so angry.搞定警察很容易——我爸用一套扬声器就把他打发了——可是我却从没见我妈那么生气过。
During live performances, like plays, operas and musicals, sound output as heretofore been largely hindered by whatever speaker system happens to be in place at the venue.在此之前的现场演出,与戏剧、歌剧和音乐剧一样,声音输出都会被喇叭系统在场地中的位置所限制。