The lower jaw should be parallel to the floor.

下颚应该与地板平行。

The lower jaw can rotate as the fixpoint is condyle.

下颌能做以髁状突为定点的转动.

Simply speaking there are normally 20 teeth in the upper jaw and 22 in the lower jaw.

简单来说，通常上颚部分有20颗牙齿，下颚部分有22颗牙齿。

The lower jaw is broad enough for the lower teeth to be straight and even.

下颌宽阔，足够排列所有的下部牙齿。

Expansion of the lower jaw involves uprighting tipped lower teeth, since there is no lower suture to open.

比较低的颚扩充包括直立的装顶端了比较低的牙齿，自没有比较低的缝合打开以后。

The lower jaw shifts forward and the upper and lower teeth don’t fit together properly.

下颌下垂，而上颌和下颌齿没有合适地处在一起。

This tooth on the lower jaw is sensitive to heat and hot.

下颌的这颗牙对冷热很敏感。

This tooth on the lower jaw is sensitive to cold and hot.

下腭上的这颗牙齿对冷热很敏感.

What happens is that the root is anchored well into the lower jaw.

实际情况就是这个牙根深深地嵌在其下颌骨上。

Having the lower jaw or teeth projecting beyond the upper; underhung .

下门牙或下颌突出的下颌或牙突出超过上颌或牙的；