求翻译：Fourth. they felt tired of reading with so man}' new words while they didn't know how to look them up in the dictionary. Some of my students did not read the text I ask them to do after class. I designed a questionnaire to find out why they should be so. I intended to get more detailed, more exact opinions from all the students through the questionnaire. And I tried to make it as scientific and effective as possible. At first I asked four students who were of different English levels to try out the questionnaire. Then I modified some of the items. After that I gave one of my questionnaire to my students and gave them fifteen minutes to finish it. All of them. seventy-six students returned their questionnaire which were left anonymous.是什么意思？

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