to-and-fros

名词 n.
中文释义

英文释义

名词 n.
  1. plural of to-and-fro form-of,plural
    — When you swing a child move it in short to-and-fros at first, and do not indulge in any high or rapid swings until the child is well used to the movement, ...

词形变化

to and fros alternative
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