求翻译：Some of my students can’t remember English words, which made me think of the other side of the issue: Some of my other students can remember English words. Some students complain that although they have learned English for many years, they are still incompetent in speaking、writing、listening and reading. They cannot read English books in the original. They difficulties in reading English newspaper and magazines, And the fail the examinations, lack of enough vocabulary is the main problem for their in the exams and their incompetence. In using English, they worry excessively about their insufficient vocabulary. This, in turn, made me think of these: Why some don't, while others do? Who are the some that don't? And who are the others that do? Is it also the case that they can't remember English words, either? If, on the other hand, all of my students can remember English words, then my problem is actually caused by myself, not by my students. Probably I don't have the effective methods to help them remember the words.是什么意思？

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