53. The nineteenth-century chemist Humphry Davy presented the results of his early experiments in his "Essay on Heat and Light," a critique of all chemistry since Robert Boyle as well as a vision of a new chemistry that Davy hoped to found.A选项正确，只要考点在于同位语。平行结构。 对此题我的疑问是since Robert Bovle用在这里是什么意思？求各位大侠们帮帮忙看看~~
A选项正确，只要考点在于同位语。平行结构。 对此题我的疑问是since Robert Bovle用在这里是什么意思？求各位大侠们帮帮忙看看~~
以下是来自朗文的解释。 since 1 [generally used with a perfect tense in the main clause] from a particular time or event in the past until the present, or in that period of time: We've been waiting here since two o'clock. I haven't played rugby since I left university. She left London ten years ago, and I haven't seen her since. The factory has been here since the 1970s. It was exactly five years since her father had died. Since the end of the war over five thousand prisoners have been released. He lost his job five years ago, but has since found other work. I left school in 1995, and since then I've lived in London. ever since (=all the time since) We've been friends ever since we were at school together. She's been terrified of the sound of aircraft ever since the crash. We came to the UK in 1974 and have lived here ever since.
2 used to give the reason for something: Since you are unable to answer, perhaps we should ask someone else.
3since when?spoken used in questions to show that you are very surprised or angry: Since when have you been interested in my feelings?
4long sinceif something has long since happened, it happened a long time ago: I've long since forgiven her for what she did.
I think the implication is that Robert Boyle's work and discoveries were so significant that there was an era associated with his work that is known and obvious. Keep in mind, though, that this is not a real GMAT question and is not written to GMAT standards.
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发表于 2011-8-7 10:16:08
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