例句與造句

1. In a small proportion of animals the wool is entirely black, and the skin is also black; these black-skinned sheep are resistant to the effects of the poisonous " Hypericum crispum ", common in the Salento, which in the white-woolled, pale-skinned sheep causes dermatitis.
2. It's difficult to find hypericum crispum in a sentence. 用hypericum crispum造句挺難的