beneficial

• 有益的书

  useful book

• 有益的活动

  beneficial activity

• 有益的影响

  beneficial effect

• 有益于健康

  good for one's health

• 运动有益于健康

  exercise is good for one's health

• 有益于国家和人民

  be of value to the country and its people

• 于事有益

  help matters