| A | B |
|---|
| advances | developments |
| makeshift | made using whatever is available |
| accompany | provided together with something else |
| patent | right to make and sell something |
| acquire | to obtain something |
| envision | to imagine; foresee |
| devices | machine invented for a certain use |
| initial | at the beginning |
| illuminated | made bright with light |
| simultaneously | at the same time |
| distribute | to supply goods to people or stores or companies |
| aware | realizing that something is true or exists |
| regulate | to control an activity, often with rules |
| chronological | arranged according to date |
| guarantee | to promise that something will happen or be done |
| depression | a feeling of sadness and loss of hope |
| criteria | standards used to help judge or decide something |
| compete | to try to win or gain something against others |
| responsible | in charge of taking care of something |
| audience | the people watching a performance |
