[ 'baundri ] 柯林斯星级 ★★☆☆☆ BNC词频 2050 COCA词频 2776 n. 边界, 分界线 [计] 边界 n. the line or plane indicating the limit or extent of something n. a line determining the limits of an area 复数: boundaries 英汉双解字典由 ECDICT 提供