“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	pyrethrum pyrexia pyrgeometer Pyrgotidae pyrheliometer pyridine pyridostigmine bromide pyridoxal hydrochloride pyridoxal phosphate pyridoxine hydrochloride pyrimidine pyrite pyrite roasting pyritization pyritobitumen pyritohedron pyritoid pyro- pyroaurite pyrobelonite pyrobiolite pyrobitumen pyroborate pyrocatechuic acid pyrocellulose

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