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- Mo-S-H2O系 Mo - S - H2O system
- ZnS-H2O系 ZnS-H2O system
- 系 system
- FeS-H2O系 FeS-H2O system
- Li-Fe-P-H2O系 Li-Fe-P-H2O system
- Ni（Ti）-H2O系 Ni (Ti) -H2O system
- Mo-Co-S multi-walled carbon nanotubes
- 院系 department
- 系上 to buckle up
- 几种Mo-Cu-S簇合物的固体~(13)C MAS NMR谱 THE SOLID STATE ~(13)C MAS NMR STUDIES OF SOME MO-Cu-S CLUSTERS
- 系带 chalaza
- 中文系 department of Chinese language and literature
- 菜系 style of cooking
- Zn（Met）SO4·H2O（s） Zn(Met)SO4·H2O(s)
- 系的 phyletic
- 科系 department
- 系动词 copula
- 全系 holophyly
- 外语系 department of foreign languages
- 家系 stemma
