a jutting chin的用法和样例：
- The Gran are easily distinguished by their triple eyestalks. They have hircine faces, small horns, and a jutting jaw-line.
- He wiped a dribble of milk from his chin with a handkerchief.
- The soldier saw a gun jutting out from a bush.
- He was so fat that he had a double chin.
- She tied a bib under her son's chin.