例句與造句

1. wang liang, ma shou-feng, he guo-guang, a hierarchical coordination model between traffic control and route guidance [ j ] . theory and practices of systems engineering, 2004 ( 6 ) : 126-133
   王亮，馬壽峰，賀國光一種交通控制與誘導(dǎo)遞階協(xié)調(diào)優(yōu)化模型[j]北京：系統(tǒng)工程理論與實(shí)踐，2004（6）：126133
2. It's difficult to find hierarchical coordination in a sentence. 用hierarchical coordination造句挺難的