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单词
F region
释义
F region
美
英
un.
F区;F层
英汉
英英
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
).
随便看
yattered
yattering
yatters
yaud
yauld
Yaunde
yaunde
yaup
yaupon
yaupons
yautia
yautias
YAVIS
yaw
yaw acceleration
Yawata
yawata
yaw axis
yaw damper
yawed
yawer
yawey
yawhead
yawing
yawl
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更新时间:2024/10/15 5:20:37