The tenor was a pupil of a singer.这位男高音歌手师承一位歌唱家。A bonus of up to 5 per cent can be added to a pupil's final exam marks as a reward for good spelling, punctuation and grammar...小学生期末考试的分数最多可以加5分，作为对其拼写、标点和语法正确的奖励。As...
When not removed, plaque causes tooth decay and gum disease.牙斑如果不清除就会导致牙齿蛀蚀和牙龈疾病。I've tried everything from herbal cigarettes to chewing gum.中草药香烟、口香糖之类的我统统都试过了。Deposits of plaque build up between the tooth and the ...