轮行走的时候，向四方都能直行，并不掉转。头向何方，他们也随向何方，行走的时候并不掉转。
旧约 - 撒母耳记下(2 Samuel)
When they went, they went upon their four sides; they turned not as they went, but to the place whither the head looked they followed it; they turned not as they went.
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