They can also be made of plastic, animal bone or metal.
它们也可以由塑料、动物骨头或金属制成。
The first year, we went through 15,000 pieces of animal bone, all of them wild.
在第一年，我们就检测出了15,000块动物的骨头，它们全都是野生的。
To establish an objective animal model for experimental study of bone nonunion.
为骨不连的实验研究建立一种客观的动物实验模型。
Objective Through a long-term training with incremental load to establish bone mass loss animal model.
目的：建立长期递增负荷运动致骨量降低动物模型。
This kind of bone meal is from the animal dying of illness at first.
这样的肉骨粉是来自动物死亡的疾病在第一。
This kind of bone meal is from the animal dying of illness at first.
这样的肉骨粉是来自动物死亡的疾病在第一。
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