點到集的映射point: n. 1.尖頭,尖端;尖頭器具;〔美國〕筆尖;接種針,雕 ...set: vt. (set; setting) 1.放;擱;貼;靠 ...mapping: n. 【數(shù)學】映像,映射。 point-by-point mapping: 逐點測圖mapping of a set onto another: 映成下載手機詞典可隨時隨地查詞查翻譯