您要查找的是不是：
- N-P系N-P series
- 系system
- 液态Ni-P,Ni-Zr-P系的表面张力及其对Al_2O_3的润湿性SURFACE TENSION OF LIQUID Ni-P AND Ni-Zr-P ALLOYS AND THEIR WETTABILITY ONTO ALUMINA
- 院系department
- 系上to buckle up
- 系带chalaza
- p-n 结p-n junction
- 中文系department of Chinese language and literature
- N/PN/P
- 菜系style of cooking
- 系的phyletic
- p-n结p-n junction
- 科系department
- 系动词copula
- N／PN/P
- 全系holophyly
- 外语系department of foreign languages
- N、PN and P
- 家系stemma
- 双n/p比double n/p ratio
