gum cover

例句：

1. 1. Thedentist advised him to keep his gumsclean and avoid gum coverage.
   牙医建议他保持牙龈清洁，避免牙龈覆盖。
2. 2. Duringthe procedure, the dentist carefully removed thegum coverage and exposed the tooth.
   在手术过程中，牙医小心翼翼地移除了牙龈覆盖物，露出了牙齿。
3. 3. The patientwas given a special gumcoverage to protect the treated areafrom infection.
   患者被给予一种特殊的牙龈覆盖物，以保护治疗区域免受感染。