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Alternates
[ɔːltə(r)neɪts]
例句/造句/用法:
The
current
obtained
from
such
a
dynamo
alternates
in
direction
,
flowing
first
in
one
direction
and
then
in
the
opposite
direction
.
伯莎M.克拉克.
科學通論
.
布什校對