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1 . 科学家们说昨天实验失败的原因不可能存在于设备上,因为科学家们已经仔细检查了它多次。
The scientists said that the reason for the failure of yesterday’s experiment________ ________ ________ ________ ________ the equipment, for they had carefully examined it many times.
The scientists said that the reason for the failure of yesterday’s experiment
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