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.戒指内侧有一层厚厚的锈斑。The tarnish lay thick on the inside of the ring.她比较胖，脸色暗淡、多斑。She was rather fat, and her complexion was muddy and spotty....
It tells the story of an aspiring young man's attempt to rise above the squalor of the street.它讲述了一位有志青年试图摆脱贫苦肮脏的街头生活。It's a kind way of telling aspiring novelists, "Don't give up the day job".这是劝诫立志成为小说家者...
He drove with blithe disregard for the rules of the road.他开车时全然不顾交通法规。He showed a reckless disregard for his own safety.他对个人安危全然无所顾忌。a wanton disregard for human life全然不顾人的死活...