puberty
noun
ˈpjuːbəti
noun
1
the
stage
of
physical
development
during
which
you
change
from
a
child
to
an
adult
and
are
able
to
have
children
青春期
Fourteen
is
a
fairly
normal
age
for
a
girl
to
reach
puberty
.
十四岁是女孩进入青春期相当正常的一个年龄。