Yet, since 1856, mercuryamalgam is “the” filling dentists have used to repair our teeth.
然而，自1856年以来，汞合金填充物一直被用于修补我们的牙齿。
2
The element mercury has been shown to damage the human nervous system. Yet, since 1856, mercuryamalgam is “the” filling dentists have used to repair our teeth.
虽然说汞对人体神经系统有害，但1856年以来，汞齐就被用于修补人们的牙齿了。
3
The element mercury has been shown to damage the human nervous system. Yet, since 1856, mercuryamalgam is "the" filling dentists have used to repair our teeth.