“penumbra”概念、定义、翻译-科学时代

单词	penumbra
释义	美术、书法与摄影词汇手册 penumbra 画面阴暗交界处；半影
随便看	assembly training assembly unit assembly unit assent ASSERT assertion assertion assertion assertion logic assertion sign assertion system A assertive assertiveness assertiveness assertiveness training assertiveness training assertoric judgement assertoric proposition assert signal assess assess assess assessable goods assessable income assessable income

科学时代收录了1160609条科普词条，基本涵盖了常见科普常识及英语词汇的翻译，是科学学习和研究的有利工具。