Sentence:  Evegeni Dubovskoi conducted an exceptionally large orchestra , one containing excellent soloists - the violin solos by the concertmaster , Guy Lumia , were especially fine - but one in which the core of traveling players and the body of men <WSD>added</WSD> locally had not had time to achieve much unity . 
Meaning of the word marked with <WSD> tags:  make an addition (to); join or combine or unite with others; increase the quality, quantity, size or scope of