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.莫妮卡拿起她的伯罗圆珠笔，放在牙齿间转动着。Monica picked up her Biro and revolved it between her teeth.它猛地朝我的脚脖子咬下去，牙齿还咔咔直响。His teeth clicked as he snapped at m...
The object is no longer in cyclical motion.这物体已不再循环运动....the cyclical nature of the airline business.航空业的周期性Some do not even realise that cyclical downturns are normal.有些人甚至不明白周期性衰退是正常的.The complex of sand bodies develop...
Many folk songs have " refrains ", that is, regularly repeated independent elements attached to each stanza.许多民歌有 “ 重复句 ”, 即每一段都有规则地重复出现的单独句.Aesthetic taste and the level of technic refrains the handicraftTujia brocade.审...