| A | B |
|---|
| colleague | someone you work with |
| device | an object that has been invented for a particular purpose |
| gap | a clear difference or imbalance; a space between two things |
| gradual | occuring in small stages over a long time |
| insight | an accurate and deep understanding of something |
| nonetheless | nevertheless, in spite of a situation |
| reproduce | to copy something, to produce offspring |
| riddle | something that is very difficult to understand |
| vertical | standing or pointing straight up |
| vital | necessary or very important |
