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（单词翻译）
Calls to protect Australia's koalas
Vocabulary
conservationists
people who take an active part in the protection of the environment
estimate
roughly calculate
threats
things that could have a negative impact
infertility
not being able to produce babies
eating away at
steadily removing
endangered
at risk of dying out
furry
covered with fur
panel
group of specialists
in trouble
facing difficulty
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