It is the jointaction that emerges when speakers and listeners—or writers and readers—perform their individual actions in coordination, as ensembles.
当演讲者和听众——或者作者和读者——以合奏的形式，协调地执行各自的行动时，这种联合行动就出现了。
2
Their initial task was to decide which of the many forest problems of concern to Europe involved the largest number of countries and might be the subject of jointaction.