a hard-nosed businessman的用法和样例：
- Joe's father was a hard nosed army officer who had seen service in two wars.
- It's natural to slack2 off towards the end of a hard day's work.
- Let's collect the sap before its consolidation into a hard mass.
- The emery is a hard metallic substance.
- We must take a hard look at our finances.
- We led a hard life in times of stress.