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(单词翻译:双击或拖选)
Frankincense under threat, says study
Vocabulary
resin
sticky substance that runs inside the trunk of trees
drylands
areas with a small amount of moisture
struggling to sustain itself
having difficulty in keeping alive
monitored
watched carefully
to model the changing population
to make a projection of the number of specimens in the future
declining
reducing
livestock
farm animals
pushed out
forced out of the area
safeguard
protect
traded
bought and sold
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