我唯一遗憾的是错过了去国外进修的机会。
My only regret is that I have missed the chance to go abroad for further education.
我唯一遗憾的是，由于已有约定在先，我不能分身与会。
I only regret that, due to prior commitments, I cannot be with you in person.
我唯一遗憾的是在PHP层与数据库之间没有实现某种类似ActiveRecord的框架。
The only thing I regret is not having implemented some kind of ActiveRecord-like framework between the PHP tier and the database.
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