make an investigation on

• 调查； 调查研究

make an investigation on的用法和样例：

例句

1. They held an inquiry into the incident.
   他们对这一事件展开调查。
2. OK, we will make an investigation.
   那我们在详细调查一下吧。
3. Some of us often neglect such investigation and study.
   我们有些人常常忽略了这类调查研究。
4. It's not right to make a decision without investigation and study.
   没有调查研究就作出决定是不妥的。