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来源:雅诚德英语网
First, scientists injected rats with ghrelin, and videotaped their noses.
首先,科学家们给老鼠注入了这种激素,并且将录像机对准它们的鼻子。
First, scientists injected rats with ghrelin, and videotaped their noses.
首先,科学家们给老鼠注入了这种激素,并且将录像机对准它们的鼻子。