An important principle for handling relations between fraternal parties .
处理兄弟党关系的一条重要原则。
And scores were significantly more matched between identical as opposed to fraternal twins .
同卵双胞胎之间的辨认结果比异卵双胞胎的相似得多。
Family history is often a good predictor of the probability of premenstrual syndrome ; studies have found that the occurrence of pms is twice as high among identical twins compared with fraternal twins .
