1. 活化 activation radioactivation
  2. 活化作用 activation
  3. 活化分析 activation analysis
  4. 活化剂 activating agent
  5. 活化吸附 activation absorption
  6. 活化处理 activating treatment
  7. 活化污泥法 activated-sludge method
  8. 活化炉 activation furnace
  9. 活化能 activation energy
  10. 活化酶 activating enzymes
  11. 活受罪 have a hell of life
  12. 活口 a survivor of a murder attem...
  13. 活口扳手 shifting wrench
  14. 活叶文选 loose-leaf literary selectio...
  15. 活吞 swallow sth. raw and whole
  16. 活命 earn a bare living
  17. 活命之恩 indebtedness to sb. for savi...
  18. 活命哲学 the philosophy of survival
  19. 活命器官 vitals
  20. 活地狱 hell on earth
  21. 活埋 bury alive
  22. 活埋恐怖 taphophobia
  23. 活塞 plunger
  24. 活塞下降行程 downstroke
  25. 活塞圈 piston ring
  26. 活塞在蒸汽压力下运动 The piston moves by steam pr...
  27. 活塞头 piston head
  28. 活塞密封圈 piston packing
  29. 活塞杆 piston rod
  30. 活塞环 packing ring
  31. 活塞环擦伤 piston ring scuffing
  32. 活塞碗 piston cup
  33. 活塞筒 piston cylinder
  34. 活塞行程 piston travel
  35. 活塞销 wrist pin
  36. 活头儿 interest to live
  37. 活套儿 slipknot
  38. 活字 type
  39. 活字典 a walking dictionary
  40. 活字印刷 letter press
  41. 活字印刷术 typography
  42. 活字板 letter press plate
  43. 活字版 edition from movable types
  44. 活字盘 news case
  45. 活学活用 creatively study and apply
  46. 活宝 a bit of a clown
  47. 活局子 a trap
  48. 活底 false bottom
  49. 活度 activity
  50. 活度系数 activity coefficient
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