国产热热热精品,亚洲视频久久】日韩,三级婷婷在线久久,99人妻精品视频,精品九热人人肉肉在线,AV东京热一区二区,91po在线视频观看,久久激情宗合,青青草黄色手机视频

Programme Introduction 節(jié)目簡介

Traditionally, many of us gained knowledge of the world by referring to encyclopedias. Now more and more of us favour their online equivalent such as Wikipedia. But can you really compare the two? Vicki and Oliver investigate.

以前我們會通過百科全書來增長知識，而如今越來越多的人開始利用網(wǎng)絡(luò)中的百科全書，也就是維基百科全書。跟隨 Vicki 和 Oliver 去看個究竟。