重点讲解：
1. pros and cons 利弊；优缺点；
We discussed the pros and cons of changing the company's operating system.
我们讨论更换公司操作系统的利弊得失。
2. because of 因为；由于；
Parts of the motor wore out because of constant usage.
发动机的一些部件因为经常使用而磨损了。
3. even though 即使；尽管；纵然；
Even though I'm quite a reserved person, I like meeting people.
我虽然性格极为内敛，但喜欢和人接触。
4. agree to 同意；应允；答应；
He said all that remained was to agree to a time and venue.
他说剩下的只是商定一个时间和集会地点。

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