Hello, Yi. Your English is correct. The only thing a bit odd is the phrase “speed-up within seconds”. If we mention seconds, then we should get specific with our measurements: “…that can go from zero to sixty in 2.3 seconds (or whatever; I’m not into cars). Or we could drop the measure words entirely: “…with powerful acceleration.”

In your third example, you might want to connect the sentences to highlight the relationship: “As research project got underway, he became obsessed with data.

One more thing — the use of “study” in the title is a bit unclear. Used countably, it seems to indicate a research study, but I think you may mean “language study” or “study session” or something like that.