My friend automatically locked the doors. (Para. 13)
Meaning: My friend locked the doors without thinking about it..
automatically: ad. without thinking about what you are doing
I automatically jump back when I see a snake. 看到蛇，我本能地往后跳。
automatic: a. done without thinking or like a machine
The automatic door opens when we approach it. 我们一靠近，自动门就开了。
Many banks have automatic money machines so that we can take out some money by ourselves. 许多银行有自动取款机，这样我们可以自己取款。