What's the difference between efficient and proficient?

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Tags

1. #something
2. #efficient
3. #without
4. #capable
5. #proficient
6. #energy
7. #often
8. #unusually
9. #materials
10. #language
11. #desired
12. #doing
13. #describes
14. #wasting
15. #results
16. #comparing
17. #effective
18. #producing