The normal corneal endothelial cells of youths and children were hexagonal in shape and uniform in size, but they became irregular both in shape and size in persons above 40 years old.
正常青年和儿童的角膜内皮细胞呈六角形，大小一致；而40岁以上者形态和大小不一致。内皮细胞的密度随年龄增长而减低，面积随年龄增长而增加。
This creates extremely small spherical toner particles of a uniform size (around 3 micron in diameter) and shape.
这将创建一个统一的非常小的大小(直径约3微米)和球形碳粉颗粒。
Magnesium hydroxide that was of nanometer level and flake shape and had uniform particle size was synthesized by calcination and hydrochloric acid-acidification and with magnesite as raw material.
以菱镁矿为原料，经煅烧、盐酸酸化后与氢氧化钠反应合成了纳米级、片状、粒度均匀的氢氧化镁。
Magnesium hydroxide that was of nanometer level and flake shape and had uniform particle size was synthesized by calcination and hydrochloric acid-acidification and with magnesite as raw material.
以菱镁矿为原料，经煅烧、盐酸酸化后与氢氧化钠反应合成了纳米级、片状、粒度均匀的氢氧化镁。
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