New words：

regretful [rɪˈɡretf(ə)l] adj. 后悔的；失望的；令人惋惜的；遗憾的

Sample Sentences：

I'm regretful that I made such a mistake.
I am never regretful to choose the major by now.
You can see from his face that he is regretful now.

New words：

regret doing 后悔做了；对做过的事表示遗憾、后悔
regret to do 后悔去做；对将要做的事表示遗憾

Sample Sentences：

There are many things I regret doing to you.
I regret to tell you that I can't spend the weekend with you.

New words：

regret [rɪˈɡret]
n.遗憾；懊悔；痛惜；失望
v.懊悔；感到遗憾；惋惜

Sample Sentences：

She looked back on the past without regret.
She has not shown any real regret for what she did.

I deeply regret what I said.
I regret that I am unable to accept your kind invitation.

New words：

Automation [ˌɔtəˈmeɪʃ(ə)n] n.自动化

Sample Sentences：

Automation will mean the loss of many jobs in this factory.
Automation in farming helps grow more food with fewer workers.

New words：

automatic [ˌɔtəˈmætɪk] adj.自动的；

Sample Sentences：

She set the camera on automatic.

Switch the camera into the automatic mode.

That's an automatic washer; all we need to do is just put the clothes in and then press the power button.

automation