a face marked by smallpox的用法和样例：
- He remembered that she was a woman of about thirty, tall and slim, with a small oval face faintly marked by smallpox.
- He had a round face, marked by smallpox, a firm chin, uncurving lips, white teeth.
- He had a round face, marked by smallpox, a firm chin, incurving lips, white teeth.
- There was one Pilgrim-woman, Fedosyushka, a quiet, little woman of about fifty, marked by smallpox, who had been wandering for over thirty years barefooted and wearing chains.