第一手材料 dìyīshǒucáiliào firsthand material Definitions Defs Origin Strokes Stroke Words Sentences Sents 第一手材料 dìyīshǒucáiliào firsthand material material obtained directly from personal experience or firsthand investigation; primary sources
第一手材料 dìyīshǒucáiliào firsthand material material obtained directly from personal experience or firsthand investigation; primary sources
