控制组在实验时不作任何提示，对其余五个实验组则提出不同要求的语言提示水平。
During the experiment, the control group was not given any lingual cue but the other fives were given different level of lingual cues.
控制组在实验时不作任何提示，对其余五个实验组则提出不同要求的语言提示水平。
During the experiment, the control group was not given any lingual cue but the other fives were given different level of lingual cues.
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