野生动物濒危的原因可分为外因和内因，外因多是人为因素造成，而内因主要是遗传衰竭、疾病等。
The reason of endangered wild animals can be divided into the external and internal. External is caused by man-made factors, internal is genetic failure and disease.
野生动物濒危的原因可分为外因和内因，外因多是人为因素造成，而内因主要是遗传衰竭、疾病等。
The reason of endangered wild animals can be divided into the external and internal. External is caused by man-made factors, internal is genetic failure and disease.
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