The normal development of the teeth and jaws may be affected by the way that a child sleeps.

孩子们牙齿和颌部的正常发育可能因睡眠的姿势而受到影响。

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Both genes are necessary for the healthy development of the palate, teeth,skull and other facial structures.

VOA: special.2009.12.22

Breast milk,they say, is the best food for the healthy development of teeth.

VOA: special.2009.03.11

It could interfere with the correct development of permanent teeth.

VOA: special.2009.03.11

Another project being carried out at the lab is looking at the signals of juvenile development left in the teeth of fossil hominids.

BBC: Hi-tech scans reveal brain of human 'ancestor'