Personally, I think the idiom is:

1. Habit becomes nature

2. Practice makes perfect

3. Open source and reduce expenditure

Immune to it

5. Borrow flowers to offer Buddha gifts

6. Better late than never

7. Thinking about the source of drinking water

8. Everywhere

9. Exquisite in all aspects

10. A new generation of old metabolism

1 1. Qi Xin cooperates.

12. Do your best

13. Immortality

14. Dental laboratory

15. Open source and reduce expenditure

16. Draw inferences from others

17. Carry firewood to put out the fire

18.

19. Make the finishing point

20. gild the lily

2 1.

22. Better late than never.

23. Smith (last name)

24. anticlimactic

25. A dog jumped over a wall

26. I'm at the end of my rope

27. A frog in the well

28. A drop in the ocean

29. Make a lot of noise

30. brain attack

3 1. opportunistic

32. muddle along

33. Make up for some mistakes

34. Be picky.

35. Innovation

36.speculation

37. uncertainty

Take firewood to put out the fire.

39. Take advantage of others' danger

40. Luoyang paper is expensive

4 1. Stay alert

42. A journey of a thousand miles begins with a single step.

43. Penglai Fairy Island

44. Great.

45. I feel sick.

46. Tell everything you know, and you can tell everything.

47.everywhere

48. embattled

49. The door is empty

50. The wind is surging.