问题标题:
swimmingisaneasye________?
问题描述:

swimmingisaneasye________?

蓝厚和回答:
  swimmingisaneasyexercise?   exercise   n.C练习,习题;训练,锻炼;U行使,运用,实行;C演习,操练   vt.训练,锻炼;行使
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