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单词
free period
释义
free periods是free period的复数
free period
美
英
un.
自由周期;免费期间;自由振荡周期
复数:
free periods
英英
n.
1.
a
part
of
the
school
day
when
a
student
or
teacher
does
not
have
a
class
例句
释义:
自由周期,免费期间,自由振荡周期
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更新时间:2026/5/13 5:57:24