Manual machines can put pearls in any place in the outer zone.
手动机器人可以把珍珠放在外区任何地方。
Calcium content increases gradually from outer zone to inner zone in dentin.
牙本质从外层到内层钙含量逐渐升高；
The outer zone is made up of reticular cells, columnar cells and mucous cells;
外区主要由网状上皮细胞、柱状上皮细胞、黏液细胞组成；
The outer zone is made up of reticular cells, columnar cells and mucous cells;
外区主要由网状上皮细胞、柱状上皮细胞、黏液细胞组成；
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