| A | B |
|---|
| described | told about in detail |
| investment | spending of time, money or effort to get something in return |
| observation | a remark or comment |
| opinion | idea or belief about a subject |
| research | gathering of information; systematic study of a specific problem or subject |
| successful | having a good result; turning out as planned |
| viewpoints | ways of thinking about something; attitudes |
| Braille | a system of printing and writing for blind people |
| clever | quick in thinking or learning; smart; intelligent |
| complained | found fault with something or showed pain or displeasure |
| complicated | not simple; hard to untangle, solve, or understand |
| doomed | destined or sentenced to a bad or tragic end |
| expert | having much special knowlege and experience; very skillful |
