| 21. | commercially productive |
| 有商业效益的
|
| 22. | fields now productive only of weeds |
| 现在只生长野草的田地
|
| 23. | profitably productive |
| 富有经济效益的
|
| 24. | the productive of |
| 有出现…的倾向，可能产生…结果
|
| 25. | trees productive of nuts |
| 结坚果的树
|
| 26. | an age productive of great men |
| 伟人辈出的时代
|
| 27. | productive of happiness [great annoyance ] |
| 会带来幸福[巨大烦恼]的
|
| 28. | productive of great inconvenience |
| 会带来很大不便的
|
| 29. | productive of ill [harmful] effects |
| 会产生恶果的
|
| 30. | a method productive of results |
| 富于成效的方法
|