make an investigation of的用法和樣例：
例句
- They held an inquiry into the incident.
他們對這一事件展開(kāi)調查。 - Investigation of fraud was their commission.
調查詐欺舞弊是他們的任務(wù)。 - Some of us often neglect such investigation and study.
我們有些人常常忽略了這類(lèi)調查研究。 - We have already made a careful investigation of the case.
我們已經(jīng)對這個(gè)索賠案件做了詳細的調查研究。
