The best way to learn proper English is to read news report, and watch news on TV. Watching TV shows is a great way to learn casual English, slang words, understand culture reference and humor. If you have already watched these shows then you may recall the words used in the following dialogs.

Very well.
Reinitiating CALIBRATION sequence.
The Big Bang Theory Season 8, Episode 22

Step one. Rapidly flip the CALIBRATION switch
from the fully up...
The Big Bang Theory Season 8, Episode 22

It means the CALIBRATION failed.
We have to start over.
The Big Bang Theory Season 8, Episode 22

Initiating CALIBRATION sequence.
The Big Bang Theory Season 8, Episode 22