back of a tooth

常见例句

Wanda finds a tooth in the back of Ms. Frizzle´s classroom.
旺达在弗瑞斯老师班级的教室后面发现了一颗牙齿。
Proof of this can be determined by dropping a baby tooth into a glass of it, then going back the next morning to find most of it eaten away.
我们来终结这个流言：将一颗牙齿仍在可乐玻璃杯里，第二天早上回来发现大部分被蚕食了。
Not only do they have a sharpened peg of a tooth but their teeth narrow down to a razor sharp edge at the back making the tigers bite much more lethal.
它们不仅仅有锋利的三角状牙齿，而且背面向下逐渐收缩成剃刀一样锋利，这使得老虎的咬更加致命。