If you're not taking notes in this lecture, you have to write down at least one sentence. You must write this down because this will be the most important thing I say all morning: Milton's Paradise Lost is the first narrative poem in English that didn't rhyme.
就算你们这堂课不记笔记,也一定要记下至少一句话,一定要把这记下来,这是我一早上说的最重要的一句话了:,弥尔顿的《失乐园》是,第一首不押韵的英语叙事诗。
So, imagine taking two IgG's, turning one upside-down and then they're hooked together.
想象一下,有两个IgG分子,将其中一个倒置,那么两个分子将会相互钩住
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