“首日封”的概念、定义、翻译、参考文献-科学参考

单词	首日封
释义	首日封 Encyclopedia 工学集邮品释 first day cover首日封在新邮票发行首日，将该套邮票的全套或单枚贴在特制信封、普通信封或纪念信封的右上角，加盖当日邮政日戳或特制的首日纪念邮戳的信封。
随便看	gastrotomy gastrovascular cavity gastrula gastrulation gas tungsten arc welding，GTAW gas turbine gas turbine-based distributed energy system gas turbine commissioning test gas turbine compound system gas turbine engine gas turbine generator set gas turbine plant gas turbine power plant gas turbulence coefficient gas vacuole gas ventilation gasvolume gas wall-mounted furnace gas water heater gas welding gas well apparent skin factor gas wellbore delivery capacity gas well deliverability gas well high velocity non-darcy effect gas well inflow preformace relationship curve

科学参考收录了854744条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。