primary source material meaning in Chinese
原始生油物质
Examples
- Primary source materials and video resources are much more available than for the 40s covered by the last volume . hence , the number of words and stills has also increased , constituting harder editing and translation work
由于影片数量激增，编译更费力，而且原始文献及影像资料远较四十年代丰富，全卷书的字数及图片都相应增多。