Its total of four at the bottom arches, 40 large glass window.
其底部共有4座举行拱门,40个大玻璃窗。
Incisors are the eight teeth at the front of your mouth — four at the top, four at the bottom.
门牙是分布于口腔下颚前方的八颗牙齿,四颗在上,四颗在下。
The molars are the largest teeth in the mouth and are also very strong - there are four at the top and four at the bottom.
臼齿是口腔内较大的牙齿,同样十分坚韧,分布于左右颊部后端,上下各四颗。
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