这是一种硬而脆的材料。
动物胶：通过煮沸处理动物皮和骨骼而获得的硬而脆的褐色固体。
Glue: Hard brittle brownish solid made by boiling hides and bones.
铱：如果铱听起来让你觉得熟悉，那可能是因为很多通讯卫星都是以这种硬而脆的大密度金属元素命名的，也可能是因为恐龙在白垩纪末从地球灭绝，与铱有关的缘故。
Iridium (Ir): If iridium sounds familiar, that might be because there’s a group of communications satellites named after this element, a hard, brittle and dense metal.
性能：白色，较棕刚玉硬而脆，切削力较强，化学稳定性好，具有很好的绝缘性。
Property: lt is white and harder and more brittle than A. lt features strong cutting force and steady chemical property and excellent insulation.
白刚玉微粉性能：白色，较棕刚玉硬而脆，切削力较强，化学稳定性好，具有很好的绝缘性。 。
Property:It 5 is white and harder and more brittle than A. It features strong cutting force and steady chemical property and execllent insulation.
白刚玉微粉性能：白色，较棕刚玉硬而脆，切削力较强，化学稳定性好，具有很好的绝缘性。 。
Property:It 5 is white and harder and more brittle than A. It features strong cutting force and steady chemical property and execllent insulation.
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