Dimorphism The existence of two distinct forms.二型现象:出现两种不同的类型.These variables fishers and Bayes discriminant functions to distinguish sexual dimorphism the three strains.结果表明:不同品系性差不同,判别函数对于性别判定具有明显的实用价值....
When you are sitting, keep your elbow on the arm rest.坐立时，把胳膊肘靠在扶手上。He wolfed down the rest of the biscuit and cheese.他把剩下的饼干和奶酪一扫而光。She volunteered as a nurse in a soldiers' rest-home.她自告奋勇到士兵疗养院当护士。...