What the PDF likely contains (typical structure)
If you want, I can:
How to study this PDF effectively (4-week plan, 20–30 minutes/day) Week 1 — Foundation
Instead of looking up every word, you learn to "dissect" it. When you see "Chronometer" in a text, your brain says: Chrono (time) + Meter (measure) = Time measurer. You don't need a dictionary.