get by heart meaning in English

记赚背诵

The curate might set as many chapters as he pleased for catherine to get by heart , and joseph might thrash heathcliff till his arm ached ; they forgot everything the minute they were together again : at least the minute they had contrived some naughty plan of revenge ; and many a time i ve cried to myself to watch them growing more reckless daily , and i not daring to speak a syllable , for fear of losing the small power i still retained over the unfriended creatures
尽管副牧师随心所欲地留下多少章节叫凯瑟琳背诵，尽管约瑟夫把希刺克厉夫抽得胳臂痛，可是只要他们又聚在一起，或至少在他们筹划出什么报复的顽皮计划的那一分钟，他们就把什么都忘了。有多少次我眼看他们一天比一天胡来，只好自己哭，我又不敢说一个字，唯恐失掉我对于这两个举目无亲的小家伙还能保留的一点点权力。