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- 我努力想听清他讲课讲的每一字每一句。
I tried hard not to lose a word of his lecture.
- 讲课时不要岔开（主题）。
Don't digress (from the subject) when lecturing.
- 听我讲课的人已大大减少了。
Attendance at my lectures has fallen off considerably.
- 她讲课前把讲稿匆匆看了一遍。
She ran over her notes before giving the lecture.
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