史长青：一般容易出问题的是在原料把关这方面，它的内在质量还需要第三方的检验来控制产品质量。
Shi Changqing: Generally speaking, raw material is the most vulnerable. That's why its inner-quality needs to be guaranteed by a third-party agency's examination.
1999年冬、夏季节，采用样方调查法，对长青自然保护区大熊猫栖息地选择进行了监测。
1999 year winter, the summer season, USES the quadrat survey procedure, has carried on the monitor to the ever green nature protection area panda habitat choice.
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