a child's formative years的用法和样例：
- Her formative years were spent in Los Angeles.
- This girl is in her formative years。She needs friends with good value.
- Parents and our educational institutions have a vital role to play in inculcating the right attitudes in our young during their formative years.
- Our firm is likely to reap a big profit this year.
- Involving them throughout their formative years in a non-formal educational process.