1a. I learn English every day. <routine, habit, fact>
1b. I am learning English right now. <at this present time>
2a. I have been waiting for you for a long time. <continuous period of time>
2b. I am waiting for you right now. <at this present moment>
3a. by way of results
Meaning, by looking at the results, we see that his actions produced little effect.
3b. in terms of results
Meaning, his actions didn't produce significant results.