昨晚又看了看OG第一篇文章,又有些新的想法。 下面是OG1的第三、四段 To buttress their case that caffeine acts instead by preventing adenosine binding, Snyder et al compared the stimulatory effects of a series of caffeine derivatives with their ability to dislodge adenosine from its receptors in the brains of mice. “In general,” they reported, “the ability of the compounds to compete at the receptors correlates with their ability to stimulate locomotion in the mouse; i.e., the higher their capacity to bind at the receptors, the higher their ability to stimulate locomotion.” Theophylline, a close structural relative of caffeine and the major stimulant in tea, was one of the most effective compounds in both regards. There were some apparent exceptions to the general correlation observed between adenosine-receptor binding and stimulation. One of these was a compound called 3-isobuty1-1-methylxanthine(IBMX), which bound very well but actually depressed mouse locomotion. Snyder et al suggest that this is not a major stumbling block to their hypothesis. The problem is that the compound has mixed effects in the brain, a not unusual occurrence with psychoactive drugs. Even caffeine, which is generally known only for its stimulatory effects, displays this property, depressing mouse locomotion at very low concentrations and stimulating it at higher ones. 1 我之前一直不太明白此处的compare with, 我的理解是compare A with B, 但是这里显然不是把stimulatory effects和 their ability to dislodge adenosine from its receptors来比,所以感觉这里这里是把众多咖啡因衍生物(caffeine derivatives)的stimulatory effects进行比较,比什么呢?就是比their ability(虽然是多个衍生物,但是都是比较它们的一个能力,所以ability 用单数) 2 compounds就是caffeine derivatives的同意词, 所以第二句话是紧接第一句阐述实验结果的,ETS还用了i.e.把结果强调一遍,而这里确实也是考点。 3 再看第四段,这片文章都是用现在时态的,单单第四段一上来用过去时,所以可以判断第四段是接着说第三段中的实验,所以用过去时。所以第三段和第四段是连在一起的“evidence and arguments”。 望NN指点一下偶的理解 |