孩子到两三岁时才长齐20颗乳牙。
Her bones are like those of a ten-year-old, but she still has her baby teeth.她的骨骼像10岁的孩子大的,但她依然没有换掉乳牙。
A few of them had a complete set of original baby teeth, while others had gaps where teeth had fallen out.少数几个有一副完整的乳牙,其他人牙齿脱落的地方露出牙缝。