n.結(jié)合性；關(guān)聯(lián)性
This property of composition is called associativity. 復(fù)合的這個(gè)性質(zhì)叫做可結(jié)合性。
Each operator has a precedence level and associativity. 每一個(gè)操作符都有自己的優(yōu)先級(jí)別和結(jié)合性。
