“Niger-Congo group”的概念、定义、翻译、参考文献-科学参考

单词	Niger-Congo group
释义	Niger-Congo group Encyclopedia 文学尼日尔-科尔多凡语系释 Niger-Congo group尼日尔-刚果语族尼日尔-科尔多凡语系的两个语族之一（另一语族为科尔多凡语族）。
随便看	Helmholtz differential equation Helmholtz double layer Helmholtz equation Helmholtz formula Helmholtz free energy Helmholtz function Helmholtz, Hermann Ludwig Ferdinand von Helmholtz-Kelvin contraction Helmholtz-Kelvin theory helmholtz-kelvin time scale Helmholtz-Ketteler dispersion formula Helmholtz-Ketteler formula Helmholtz-Lagrange theorem Helmholtz layer Helmholtz reciprocity theorem Helmholtz representation helmholtz resonance sound absorber Helmholtz resonator Helmholtz reversion theorem Helmholtz's equation Helmholtz's reciprocity theorem Helmholtz theorem Helmholtz theorems Helmholtz time scale Helmholtz’s vorticity-tube theorems

科学参考收录了854744条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。