by heart

• Every fireman must get the rules by heart
  每个消防队员都必须记住规则。
• 41 you just learn by heart the facts , the dates and names
  你只需牢记事件、日期和名称。
• Learning by heart can be very helpful indeed
  背诵也是有益的学习方法。
• Being illiterate , he had to learn the stories by heart
  由于不识字,这些故事他都得背下来。
• Learn it by heart by the end of the class
  从现在开始到下课把这个背好
• You ought to know the new table of work and rest by heart first
  你应该先记牢新的作息表。
• We had better learn by heart as many sentence patterns as we can
  我们最好尽可能多背句型。
• All you have to do is learn it by heart
  你只要做的就是把它背出来。
• Try to learn by heart these english words and phrases
  试著把这些英语单字和片语用心学起来。
• I like joni mitchell . i know every album by heart
  我喜欢约妮米切尔.我记得她的每一张专辑