重点讲解：
1. talk about 讨论，谈论；
例句：If you don't mind, we won't talk about it any more.
如果可以的话，我们就不要再谈论这件事情了。
2. refer to 指的是；
例句：The terms supply and demand refer to the behaviour of people as they interact with one another in markets.
供给和需求两个术语指人们在市场上相互交易时的行为。
3. hurry up 赶紧；赶快；
例句："Come on, Grace," he was urging her, "don't wait, hurry up."
“快点啦，格雷丝，”他催促道，“别等了。快点。”
4. even if 即使；尽管；纵然；
例句：I will not give up even if there is only a gleam of hope.
哪怕只有一线希望我也不会放弃。

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