have an axe to grind: have personal advantages to gain
![personal ad造句 personal ad造句](https://i2.zwzsz.com/1ee5c2852c02d5/5bbc8d/1ee4d59021/5bbc8dd1785a9d.jpg)
Portrait photography is a personal advantages of amplification.
Use the inside information for personal advantage or the personal advantage of others "Tip" others who may buy or sell securities because of the inside information.