| A | B |
|---|
| chronology | a record of events in the order of their occurrence |
| omnivore | an animal that feeds on both animal and vegetable substances |
| embargo | a government order imposing a trade barrier |
| hieroglyphic | a writing system using picture symbols; used in ancient Egypt |
| labyrinth | complex system of paths or tunnels in which i is easy to get lost |
| quarantine | isolation to prevent the spread of infectious disease |
| undulate | move in a wavy pattern or with a rising and falling motion |
| commemorate | call to remembrance; keep alive the memory of someone or something |
| enthusiastic | having or showing great excitement and interest |
| hologram | the intermediate photograph (or photographic record) that contains information for reproducing a 3-dimensional image by holography |
| vaccine | immunogen consisting of a suspension of weakened or dead pathogenic cells injected in order to stimulate the production of antibodies |
| strategy | an elaborate and systematic plan of action |
