作为一名外胚层体型者，她虽然吃得很多却很难增重。

As an ___ectomorph, she finds it hard to gain weight even though she eats a lot.

作为一个外胚型体质的人，他发现增肌比其他人更困难。

As an ___ectomorph, he finds it more challenging to gain muscle than others.