confraternity的复数形式怎么写？

n.团体，帮会，协会...

confraternity的音标：confraternity的英式发音音标为：[ˌkɒnfrə'tɜ:nɪti]confraternity的美式发音音标为：[ˌkɑnfrə'tɜnɪti]...

Zhenghai businessmen, backbone of Ningbo Confraternity, have accumulated rich experience of management in business establishment.作为“宁波帮”中坚的近代镇海籍实业家, 在艰苦的创业中积累了丰富的经营管理经验.Please expound the reasons why you wanna join the X...