es·sen·ti·al·i·ty /ɪˌsɛn(t)ʃiˈæləti/ 本性,真髓,本質
essentiality 本質
Es·sen·ti·al·i·ty n. The quality of being essential; the essential part. ◄ ►
essentiality n : basic importance [syn: essentialness] [ant: inessentiality]