To answer the first part of your question, I'd like to say that our studies were very extensive.
你问题的第一部分,我要说的就是我们的研究非常广泛。
for the woman's eyes immediately lit up and she fetched several bottles which she placed on the counter for Harry to inspect.
因为那女售货员听完哈里的话后,马上眼睛一亮,拿出几瓶东西放在柜台上让哈里挑选。