mutual benefit; 互惠
receive kindness [favour]; be favoured; 受惠
Hui Shi 惠施
equality and mutual benefit 平等互惠
be kind enough to read (the following letter); 惠鉴
your letter 惠书
牛津高阶第八版
美国韦氏词典
Dictionary.com
Free Dictionary
维基百科 (自由的百科全书)