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背单词
biostrome
biostrome
美
英
n.
生物层
网络
层状生物礁;生物礁层;钙质微生物层
词形变化
复数:
biostromes
英汉解释
n.
1.
生物层
英英解释
n.
1.
a
thin
layer
in
a
rock
formation
that
consists
of
organic
material
such
as
fossils
deposited
at
the
site
where
they
lived
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