“commemorative stamp”的概念、定义、翻译、参考文献-科学参考

单词	commemorative stamp
释义	commemorative stamp Encyclopedia 工学邮资凭证释 commemorative stamp纪念邮票邮政部门为纪念重大事件、重要活动或人物而专门发行的邮票。是邮票票种之一，图案多以与事件、活动或人物有关的内容为题材，并有特定的纪念文字或徽志及年代，发行数量有一定限制，出售时间较短，一般不再重印。
随便看	health effects of food contamination by poisonous heavy metals health effects of food contamination by polychlorinated biphenyls health effects of formaldehyde pollution health effects of high altitude environment health effects of high temperature environment health effects of hydrogen sulfide health effects of indoor microclimate health effects of laser health effects of lead pollution health effects of legionella pollution health effects of light pollution health effects of mercury health effects of mold pollution health effects of mould pollution health effects of nitrogen oxides pollution health effects of noise health effects of ozone pollution health effects of phenol health effects of photochemical smog health effects of physical agents health effects of radon health effects of sand dust Storm health effects of sulfur dioxide pollution health effects of thallium health effects of the acid rain pollution

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。