envelopedadj.被包围的动词envelop的过去式和过去分词形式.envelopen.信封；壳层；封袋envelope side-lobe diagram包络副瓣图envelope of the interference干扰包络envelope threshold detection包络阈检测enveloped correlation network包络相关网络envelope delay characteristic包络延迟特性,群时延特性envelope to cycle discrepancy包周差Envelope protein gene vaccine外膜蛋白基因疫苗envelope demodulation circuit包络解调电路enveloped toroidal worm pairs平面包络环面蜗杆副envelope of first-day issue首日封