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.牙齿和牙龈之间会滋生牙斑。Deposits of plaque build up between the tooth and the gum.需刷牙以去除牙斑.It is necessary to remove plaque by brushing one's tee...
...a scheme to lock up persistent juvenile offenders.将青少年惯犯关入监狱的计划The courts are becoming more severe on young offenders.法庭对青少年犯罪者的处罚趋于严厉。Severe penalties were meted out to the offenders.违例者受到了严惩.Prison is not the answer...
他们为大人准备了酒，为小孩准备了汽水。They had liquor for the adults and sodas for the children.梅利莎像喝柠檬汽水一样大口地喝着加奎宁水的杜松子酒。Melissa had guzzled gin and tonics like they were lemonade.这家餐馆有酒类经营执照，提供扎啤、葡萄酒、烈性酒和汽水。The restaurant is licensed, of...