Receding gums can be the result of disease or simply incorrect brushing.牙龈萎缩可能是疾病导致的，也可能仅仅是错误的刷牙方式引起的。Thoroughly brush teeth and gums twice daily.每天两次彻底刷净牙齿和牙龈.A bad tooth may cause an abscess on the gums.一颗病牙可使牙床脓肿....
The two varieties intergrade over a narrow transition zone.这两个变种在较窄的过渡地带有中间类型.The equipments are RAMS 3000 intergrade control and display system for all weather & low altitude flight.设备有用于全天候和贴地飞行的 RAMS3000 综合控制与显示系统....
I am a sinner and I need to repent of my sins.我是个罪人，必须忏悔我的罪过。Those who refuse to repent, he said, will be punished.那些拒不悔改的人，他说，将会受到惩罚。Remission of sins is promised to those who repent.悔罪者可得到赦免....
With the help of that handclasp, he succeeded.正是借助于那次握手, 他获得了成功.The essence for him is not the warm handclasp and the smiling photograph.对于他,重要的不是热烈的握手和微笑的照片....