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...
an amorphous mass of cells with no identity at all不知何物的杂乱一团的细胞A dark, strangely amorphous shadow filled the room.一团形状怪异的黑影笼罩了整个房间。The starch - containing cells may also contain amorphous protein known as gluten.含淀粉的细胞可能也...
Are you saying you gave your heart and soul to that eskimo pitch?你敢说你在爱斯基摩那个广告上尽全力了?An Eskimo is ill - fitted for living in the tropics.爱斯基摩人不适于在热带生活.It must be said in justification of the Eskimo men.这肯定都是为爱斯基摩人的辩解....
我慢慢地把那些沉重的黑色尼龙袋的拉链拉上并锁好。I slowly zipped and locked the heavy black nylon bags.她穿了一身黑色羊毛套装，显得很庄重。She was demurely dressed in a black woollen suit.黑色外套看起来总是很潇洒，而且永远也不会落伍。A black coat always looks smart and will never date....