empty set

相关单词

近义词

null set 零集(空集)

临近词

emptying, empty, empty theory, empty record, empty symbol, empty medium, empty glumes, empty-nest, empty action, empty weight, empty nodule, empty tunnel

相似词

empty calories, empty into sth, empty nest syndrome, empty nester, empty-handed, empty-headed, EMS, EMT, 返回 empty set