They are etched on to sapphire crystal disks and propelled by gearing at the peripheries of the disks.

它们是镌刻在以蓝宝石水晶磁盘和驱使传动在边缘的磁盘。

Instead of areas, the peripheries of each plane of projection were used to predict the activities of compounds.

用每一个平面的投影边缘代替面积预测化合物的活性。

The peripheries are lined by respiratory epithelium.

表面是线性排列的呼吸道上皮.