What do they mean?
computer-generated = made using a computer well-known = famous

ответ;

1. 68-year-old  2. good-looking  3. world-famous 4. action-packed                                                     Объяснение;                                                           1. Age. (68-year-old)                                                 2. Any thing being that looks good. (good-looking)                                                                       3. Everything that has become widely known around the world. (world-famous)                           4. Everything that has become widely known around the world. (action-packed)