- [数] 单位边界
- boundary: n. 边界,疆界,限界 (between);(球场)边线;界标;界限,范围,分野。 aboundary dispute 边界纠纷。 the boundary between Canada and the United States 美加国界。 boundaries on all sides 四方辐辏之所,四通八达。
- boundary mark, boundary point: 界址点
- and unit: 与单元; 与门
- on unit: 接通单元; 实时
- or unit: 或门; 或闸
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