B2 to put something into use, operation, or a place for the first time采用;引进;推行;放入,插入
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The Russian leader wants to introduce further changes.
We need to introduce more stringent security measures such as identity cards.
New measures have been introduced to try and ease traffic congestion in the city.
The government introduced a law prohibiting tobacco advertisements on TV.
They've introduced a fast-track system for brighter pupils which will allow thousands to take their GCSE exams two years early.
B1 to tell someone another person's name the first time that they meet介绍,引见
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She introduced me to some of her fellow students.
I didn't know anybody at the party, but the hostess came to my rescue by introducing me to a few people.
Here's Fiona - let me introduce you to her.
to be the beginning of something作为…的开始
C2 to speak or write before the beginning of a performance, programme or book and give information about it; to tell an audience about the person who is going to speak, sing, etc. 介绍,推介;给…写序言
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It is my pleasure to introduce tonight's guest speaker.
He introduced the visitors with a few well-chosen words.
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