ad.

1. 实际上，真的
   Did you actually see him break the window?

   你真的看到他打破窗户吗？

   She looks young, but she's actually 50.

   她看上去年轻，可是实际上已五十岁了。

2. 竟然
   She was so angry that she actually tore up the letter.

   她一气之下竟然将信撕碎了。

adv.

1. as the truth or facts of a situation.
2. as a matter of fact; even.