柯林斯英汉双解大词典
ectomorph /ˈɛktəʊˌmɔːf/
1.N a person with a thin body build: said to be correlated with cerebrotonia 外胚层体型者 → compare endomorph, mesomorph[1]
So if you are not so much of an ectomorph or are clearly endomorph, you will need to work even harder.所以，如果你是一个外胚基因很少的姑娘，或是内胚基因过于强大的姑娘，也不是不行，只不过是需求更多的努力而已。
The mesomorph may not need as much protein as an ectomorph because an ectomorph's body is probably burning more protein as energy than the mesomprph.“中型体质者”比“瘦型体质者”需要的蛋白质量要少，因为“瘦型体质者”可能会分解更多的蛋白质来提供能量。
City females the of Endomorph and Mesomorph increased with age, reached the highest value in over 60 age group, Ectomorph reached the highest value in 20 to 29 age group.随年龄增长，城市女性内因子值、中因子值逐渐增大，均在60岁以上组达到最大，外因子值在20 ~ 29岁组最大。[1]