| 21. | thoroughly investigate |
| 彻底调查
|
| 22. | investigate many cases by following the footprints left at the scene of the crime |
| 通过跟踪犯罪现场留下的脚印调查许多案件
|
| 23. | investigate the market for sales of a product |
| 就某一产品的销路作市场调查
|
| 24. | investigate into a rumor |
| 追查谣言的来龙去脉
|
| 25. | investigate into an affair |
| 调查一件事
|
| 26. | investigate the phenomenon of languages from its psychological side |
| 从心理方面对语言现象进行研究
|
| 27. | visit the scene and investigate the conditions on the spot |
| 亲临现场实地调查情况
|
| 28. | investigate a crime |
| 调查罪行
|
| 29. | investigate the question in a scientific and impartial spirit |
| 本着科学和公正的态度调查问题
|
| 30. | thoroughly investigate the subject |
| 彻底调查这问题
|