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单词
F region
释义
F region
美
英
un.
F区;F层
英汉
英英
网络释义
un.
1.
F区
2.
F层
n.
1.
the
highest
part
of
the
ionosphere
that
reflects
high
-
frequency
radio
waves
.
It
is
divided
into
two
layers
,
the
F
1,
which
extends
upwards
from
180
km
(112
mi
)
and
is
present
only
during
the
day
,
and
the
F
2,
extending
upwards
from
300
km
(186
mi
).
1.
F区
维基百科:物理学专题/维基百科缺少的大英百科... ... 眼镜 eyeglasses
F区
F region
法布里 Fabry,Charles ...
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更新时间:2024/12/25 15:39:53