3 介词by的用法疑问（by experts）
By experts, I mean those who are less likely to make
pronunciation mistakes.
本句出自2021年新高考英语全国卷I（全国乙卷）的听力录音原文。请老师说说这里 by 的用法和理解。谢谢！
附全段听力材料：
Hello, everyone. Today I’ll talk about how to improve your pronunciation. Language researchers say pronunciation and fluency are the biggest barriers, followed by grammar in effective spoken English. However, most people don’t regard pronunciation as a very important part of communication skills. They’re more focused on vocabulary. One reason is that most people are not even aware of their mispronunciations. So it’s important to first find out the words you mispronounce. You should listen to experts. By experts, I mean those who are less likely to make pronunciation mistakes. When listening to them, pay attention to words that sound strange. Strange, because you pronounce the same words differently. When you come across such words, check a dictionary to confirm their exact pronunciations. You can also search for difficult-to-pronounce words and names and make a list of them. The last suggestion is to read aloud. Now you’ve got the correct pronunciations of the words. It’s time to practice reading them every day.
最佳答案 2021-07-15 00:17
这样用的介词 by 意思是“使用（某个具体的词或短语）”（=when using a specified word or phrase)：
By experts, I mean those who are less likely to make pronunciation mistakes. 我说的专家，指的是那些不太可能犯发音错误的人。
更多例句如：
What do you mean by that? 你这样讲(或做)是什么意思?
What do you mean by “acceptable levels?” 你说的“可以接受的水平”是什么意思？
It's hard to know what the author intended by this phrase. 很难知道作者使用这个短语的用意。
She called my theory “interesting,” but I don't know what she meant by that. 她说我的理论“有意思”，我不知道她这么说是什么意思。
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