For further information on the survey methods, please see the methodology section.
如需进一步信息的调查方法，请参见方法一节。
If it is necessary to obtain primary data by survey, three methods are available.
如果有必要取得原始数据的调查，有三种方法。
The three main methods are eye survey, measurement and test.
三种方法：目测法、量测法和试验法。
The three main methods are eye survey, measurement and test.
三种方法：目测法、量测法和试验法。
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