牙医可能会决定拔掉那颗牙，以免反复发作。A dentist may decide to extract the tooth to prevent recurrent trouble.牙斑如果不清除就会导致牙齿蛀蚀和牙龈疾病。When not removed, plaque causes tooth decay and gum disease.餐后要刷牙，而且每天要使用牙线清洁牙缝。Brush your teeth after each ...
All those three books are compacted and compressed into one book.那三本书的内容全都压缩进一本书了。Jets of compressed air gave the aircraft lateral and directional stability.压缩空气的喷吐使飞机的左右和前后都能保持稳定。The compressed gas is cooled and condens...
The pianist gave a long and varied recital,with a couple of encores for good measure.那钢琴家的独奏演出时间长、节目多,还加奏了两支曲子。The singer gave four encores.那位歌手加演了4次.They performed another two songs as encores.应观众要求,他们又返场加唱了两首歌.The actr...