When it cried, she rocked it back and forth and gave it little comforting pats.
当它哭的时候，她会前后摇动，轻拍安抚它。
In a conversation, do you prefer to think through your answers before speaking, or throw out whatever idea comes to mind and bat it back and forth?
在交谈中，你更喜欢在开口前把回答想透彻，还是会随意说出任何闪现在你脑中的想法？
He liked the book very much and read it back and forth.
他非常喜欢这本书，来回地翻看。
They discussed it back and forth, without getting very far.
他们来来回回地讨论，没有很大进展。
When a wire is broken by bending it back and forth rapidly, some of the work is transformed into heat and the wire gets hot.
当把导线快速地(通过)来回弯曲折断时，部分功就转换成热，所以导线变热。
When a wire is broken by bending it back and forth rapidly, some of the work is transformed into heat and the wire gets hot.
当把导线快速地(通过)来回弯曲折断时，部分功就转换成热，所以导线变热。
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