短語詞組短語asymptotic boundary operator 漸近邊界算子boundary constraint handling operator 邊界約束處理算子international boundary operator 國際報務員weak boundary operator 弱邊界算子pseudo -boundary operator 偽邊界算子partial boundary operator [自]偏邊緣算子boundary operator of chain complex 鏈復形的邊緣算子 返回 boundary operator