[詞典]
virtuous
cycle;
[例句]鍛煉身體能夠形成壹種良性循環。壹旦妳開始壹項鍛煉計劃並持之以恒，妳會感覺良好並堅持下去。
exercise
creates
its
own
circle.
once
you
start
a
programme
and
do
it
regularly,
you'll
feel
so
good
want
to
continue.