“direct positive”的概念、定义、翻译、参考文献-科学参考

单词	direct positive
释义	direct positive [dǝ¦rekt `päz·ǝd·iv] ^{GRAPHIC ARTS} A photographic positive made by exposure to light and developed without a negative.
随便看	radiological radiological agent radiological defense radiological dose radiological survey radiological warfare radiologist radiology radiolucent radioluminescence radiolysis radio magnetic indicator radio marker beacon station radio mast underwater camera underwater demolition underwater demolition team underwater mine underwater-mine extender mechanism underwater-mine fairing underwater navigation underwater obstacle underwater ordnance underwater sound underwater sound projector

科学参考收录了103327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。