https://online2.tingclass.net/lesson/shi0529/0008/8124/830_831_danci.mp3
https://image.tingclass.net/statics/js/2012
[ti:]
[ar:]
[al:]
[by:聽力課堂~m.360newlife.cn]
[00:02]assume 假定,假設(shè)
[00:14]presume 推測(cè),假定
[00:27]border 邊界,邊境
[00:38]boundary 分界線,邊界
[00:50]frontier 前沿,新領(lǐng)域
[01:03]margin 頁(yè)邊空白;差數(shù)
[01:14]