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.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。Receding gums can be the result of disease or simply incorrect brushing.我牙龈脓肿，所以他就把那颗牙拔掉了。I got an abscess so...
He's the best opponent I've come across this season, a great player.他是我本赛季遇到的最出色的对手，一位了不起的运动员。I've never come across hieroglyphics like the handwriting of Peter Smallwood.我从未见过像彼得·斯莫尔伍德那么难辨认的笔迹。Anna approa...
3个坐在我附近的学童突然偷偷地笑了起来。Suddenly, three schoolkids sitting near me started sniggering.去年我对一群学童讲话，他们听到什么都笑。Last year I had an audience of schoolchildren and they laughed at everything.据说英国的一般学童比欧洲大陆的大多数一般学童聪明.The average Brit...