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.

at which the Earth
rotates on its AXIS,
The Big Bang Theory Season 7, Episode 2

The rate of spinning
for the central AXIS centrifuge
The Big Bang Theory Season 10, Episode 20

...on its center AXIS
until the lights turn green.
The Big Bang Theory Season 8, Episode 22

...by an inclined plane
wrapped helically around an AXIS.
The Big Bang Theory Season 4, Episode 5

...by an inclined plane
wrapped helically around an AXIS?
The Big Bang Theory Season 4, Episode 5