Proper design of sampling and survey methods can increase substantially the accuracy and usefulness of assessment data.
设计适当的抽样和调查方法，可以充分的提高评估数据的准确性，实用性。
Proper design of sampling and survey methods can increase substantially the accuracy and usefulness of assessment data.
设计适当的抽样和调查方法，可以充分的提高评估数据的准确性，实用性。
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