She injected them with phytohaemagglutinin (PHA), a substance that induces an immune reaction.
她为它们
了植物血球凝集素(PHA),这种能够引起免疫反映的物质。
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Consider the experiment done by researchers at the University of Michigan. They injected volunteers with a saline solution in their jaw muscles, simulating TMJ. If you have TMJ, a jaw condition brought on by stress, you know it hurts.
想想密歇根大学的研究人员做的这个实验吧。他们给志愿者的下颌肌肉中注射了一种盐溶液,以模拟颞下颌关节紊乱。如果你有颞下颌关节紊乱——一种由压力引 起的下颌不适,你懂得,就会疼。