1
[ADV 副词]的确；真实地；事实上 You use
actually to indicate that a situation exists or happened, or to emphasize that it is true.
[ADV before v]
[emphasis]
One afternoon, I grew bored and actually fell asleep for a few minutes...
一天下午，我觉得有些无聊，还真的睡着了一小会儿。
Interest is only payable on the amount actually borrowed.
利息只能根据实际借款数目给付。
2
[ADV 副词]（用于纠正他人或表示反对）实际上，事实上 You use
actually when you are correcting or contradicting someone.
No, I'm not a student. I'm a doctor, actually...
不，我不是学生。实际上我是医生。
'So it's not a family show then?' —'Well, actually, I think that's exactly what it is.'
“那么这并不是一次家庭才艺表演了？”——“嗯，事实上我觉得这恰恰就是一次家庭才艺表演。”
3
[ADV 副词](礼貌地表达与他人的期待所不同的观点)说实在的，说真的 You can use
actually when you are politely expressing an opinion that other people might not have expected from you.
[ADV with cl]
[politeness]
'Do you think it's a good idea to socialize with one's patients?' — 'Actually, I do, I think it's a great idea.'
“你认为和自己的病人交朋友的想法好吗？”——“说实在的，我认为很好，这个想法很棒。”
I would be surprised, actually, if he left Birmingham.
如果他要离开伯明翰，说真的，我会很惊讶。
4
[ADV 副词]（引入新话题）其实，说实在的 You use
actually to introduce a new topic into a conversation.
Well actually, John, I rang you for some advice...
这么说吧，约翰，我给你打电话是想得到些建议。
Actually, let's just read this little bit where you've made them bump into each other.
这样吧，我们就只读你让他们偶遇这一小段吧。
Usage Note :
Note that actually and really are both used to emphasize statements. Actually is used to emphasize what is true or genuine in a situation, often when this is surprising, or a contrast with what has just been said. All the characters in the novel actually existed... He actually began to cry. It can also be used to be precise or to correct someone. No one was actually drunk... We couldn't actually see the garden. You use really in conversation to emphasize something that you are saying. I really think he's sick. When you use really in front of an adjective or adverb, it has a similar meaning to 'very'. This is really serious.
注意，actually和really都用于强调。actually用于强调情况的真实性，往往是在出人意料或跟刚刚所说的话形成对照的情况下使用。例如：All the characters in the novel actually existed（这部小说中所有人物都确有其人），He actually began to cry（他真的哭了起来）。actually也可用于加强准确性或纠正别人。例如：No one was actually drunk（没有人真的喝醉了），We couldn't actually see the garden（我们其实看不到花园）。really可用于对话中强调说话内容：I really think he's sick（我确实认为他生病了）。really用于形容词和副词之前时，意思与very相近：This is really serious (这非常严重）。