以下是《当幸福来敲门》（The Pursuit of Happyness）中的20句经典台词及其英文原句：
别让别人告诉你，你成不了才。如果你有梦想的话，就要去捍卫它。
- Don't let somebody tell you you can't do something. If you got a dream, you gotta protect it.
如果你有梦想，就要守护它。
- You have a dream, you gotta protect it.
你要尽全力保护你的梦想。那些嘲笑你梦想的人，他们必定会失败，他们想把你变成和他们一样的人。
- People can't do something themselves, they gonna tell you you can't do it. If you want something, go get it. Period.
幸福里面没有为什么，只有我信任。
- There is no 'why' in happiness. There is only 'I trust'.
我是这样的人，如果你问的问题我不知道答案，我会明确告诉你我不知道。但我向你保证：我知道如何寻找答案，而且我一定会找出答案的。
- I'm the type of person, if you ask me a question, and I don't know the answer, I'm going to tell you that I don't know. But I bet you what: I know how to find the answer, and I'll find the answer.
如果你有理想的话，就要去努力实现。
- You got a dream... you gotta protect it. People can't do something themselves, they wanna tell you you can't do it.
机会总是留给有准备的人，但那往往是努力的人剩下来的。
- Opportunities are always presented to those who are ready but often left by those who work hard.
别让任何人告诉你你不能做什么，只要有梦想就去追求。
- Don't ever let somebody tell you you can't do something. You got a dream, you gotta protect it.
当你最认为困难的时候，其实就是你最接近成功的时候。
- At their lowest point, when you think you can't go any further, that's when you're closest to success.
有了目标就要全力以赴。
- When you have an objective, you gotta pursue it with all your heart.
也许幸福是一种只能在我们心中感受到的东西，而这种感觉的产生，是因为我们拥有梦想。
- Maybe happiness is something that we can only feel inside our hearts, and this feeling comes from having dreams.
我生命中的这个阶段，这个很短的阶段叫做幸福。
- This short period of my life is called happiness.
如果你有梦想的话，就要去扞卫它。
- If you have a dream, you must defend it.
我是这样一个人，如果你问我一个问题我不知道答案的话，我会直接明确告诉你，我不知道。但我向你保证：我知道怎样找到答案，而且我一定会找到答案的。
- I am such a person, if you ask me a question and I don't know the answer, I will clearly tell you that I don't know. But I promise you this: I know how to find the answer, and I will definitely find it.
时光飞逝，光阴一去不复返，所以绝不能虚度。
- Time flies, and once gone, never returns, so waste it not on trivialities.
你要照顾好你的梦想。
- You have to take care of your dreams.
幸福不是靠别人给予的，而是要靠自己争取的。
- Happiness is not given by others, but earned by oneself.
如果你有梦想，就要努力去实现它。
- If you have a dream, strive to make it a reality.
机会总是稍纵即逝，所以有梦想要赶紧去追。
- Opportunities are fleeting, so chase your dreams quickly.
如果你有梦想，就别放弃它，因为梦想需要时间去孕育。
- If you have a dream, don't give up on it because dreams take time to gestate.
这些台词不仅激励人心，还深刻反映了电影的主题和内涵。希望它们能给你带来启发和鼓励！
