| 释义 |
dental dam
noun countable
■a piece of rubber which is used to keep the teeth dry during dental treatment, or which is used to prevent HIV infection during sexual activity in which someone touches someone else's sexual organs with their mouth or tongue 牙科用橡皮布（牙科治疗中使用的胶皮防水布或口交中防止染上爱滋病所使用的阻隔膜） |