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- The Congo River (Zaire-River) is the boundary river between Angola and Congo gold (original Zaire). 主要河流有库邦戈河、宽扎河、库内内河和宽多河。
- The Congo River (Zaire River) in the north serves as the boundary river between Angola and The Democratic Republic of the Congo (former Zaire). 北部的刚果河（扎伊尔河）是安与刚果金（原扎伊尔）之间的界河。
- The lane is the boundary of our land. 那条小路就是我们这片地的界线。
- The ball ran (ie rolled) to the boundary. 球向著边线滚去。
- The four great Siberian rivers are the Ob (3300 miles), the Yenisey (2550 miles, with the Angara as its main tributary), the Lena (2720 miles) and the Amur (Heilongjiang, 2740 miles) which is the boundary river between Russia and China. 西伯利亚地区的主要河流有鄂毕河（3300英里）、叶尼塞河（2550英里,安加拉河为其主要支流）、勒拿河（2720英里）和俄罗斯与中国的界河阿穆尔河（黑龙江，2740英里）。
- The boundary is not clearly defined. 这疆界没有明确划定。
- The fence marks the boundary between my land and hers. 这道栅栏是我的地和她的地的分界线。
- A mark indicating the boundary of such an interval. 刻度线，分度线指示这种间隔的界限的标记
- The ball is caught by a fielder stand just inside the boundary. 那球被正站在边界线内的守场员接住了。
- The river is the boundary between the two countries. 这条河是两国的分界线。
- The ball was caught by a fielder standing just inside the boundary. 那球被正站在边界线内的守场员接住了。
- The duke perambulated the boundary of his estate. 公爵巡视他的庄园地界。
- Everyone feared that the boundary dispute between these two countries would culminate in a war. 人人都担心，这两国间的边境争端将以一场战争告终。
- From here the boundary turns southwestward. 边界由此折向西南。
- The boundary line of a figure, area, or object. 周围一个图形、区域或物体的边界线
- The boundary homorphism d is defined as follows. 边缘同态d按以下方式来定义。
- Not getting over's the boundary of a country. 不要越过国境线。
- The two nations had a conflict because of the boundary of a river. 因为一条河流的分界，两国发生了冲突。
- We're way beyond the boundary of the pride lands. 我们越过荣誉大地的边界了对你来说是香蕉嘴先生,乳臭未干的小子。
- B--Are all the boundary conditions CORRECT? 所有边界条件是否正确?
