Natural World vocab 2

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Across
  1. 3. adj. no longer in existence
  2. 4. v. to develop gradually; to rise to a higher level
  3. 7. adj. disastrous
  4. 8. n. farming
  5. 10. adj. in danger of becoming extinct
  6. 11. n.赤道An imaginary circle around the middle of the earth, halfway between the North Pole and the South Pole
  7. 15. v. to root out, get rid of, destroy completely; eliminate
  8. 17. adj. characterized by scanty rainfall and scrubby vegetation, often occurring in continental interiors
  9. 18. n. balance of natural relationships in the environment
  10. 23. adj. born in a particular place
  11. 24. n. a small, usually enclosed field
  12. 25. n. to get rid of; eradicate
  13. 27. adj. 热带的 belonging to or typical of the tropics
  14. 29. species n. an exotic species that has been released to the wild
  15. 30. adj. 副热带的 in or connected with regions that are near tropical parts of the world
Down
  1. 1. n. A term that typically describes a species that no longer has any known living individuals.
  2. 2. adj. limited to a particular country or area
  3. 5. adj. susceptible to physical or emotional attack or harm
  4. 6. adj. opposed to or defending against
  5. 9. adj. produced or practised without using artificial chemicals
  6. 12. n. the area around the South Pole
  7. 13. adj. mild, moderate
  8. 14. n. 基因
  9. 16. n. consequence
  10. 19. n. the area around the North Pole
  11. 20. adj. extremely dry
  12. 21. adj. moist
  13. 22. 转基因的
  14. 26. n. a biologist who studies the relation between organisms and their environment
  15. 28. n. A chemical intended to kill insects and other organisms that damage crops.