定期看牙医以保护你的牙齿和牙龈。
Protect your teeth and ___gums by visiting your dentist regularly.
定期使用牙线可以防止牙龈上的牙菌斑堆积。
Regular flossing can prevent plaque buildup on your ___gums.
健康的牙龈是坚实和粉红色的,不是红色或肿胀的。
Healthy ___gums are firm and pink, not red or swollen.