lingua franca

English functions as the global lingua franca of science, enabling collaboration across language barriers.英语充当科学领域的全球通用语，使人们能够跨越语言障碍开展合作。

The adoption of Swahili as a regional lingua franca has facilitated trade across East Africa.采用斯瓦希里语作为区域通用语促进了东非各地的贸易。