Your English is fine. You’re getting your message across very well.
The lines marked x and o represent the air conduction test results. The ones marked [ and ] represent the bone conduction test results.
It is the air conduction tests that show how your ear mechanisms from the eardrum through the middle and inner ear structures are performing, while the bone conduction tests show how the mechanisms beyond that are performing. Generally, the forum would be expecting air conduction test results in your posted audiogram.