It derives from the root word tan, which translates as "to extend, expand, spread, continue, spin out, weave; to put forth, show, or manifest."

它源自于词根“坦”，翻译起来就是延伸、扩展、蔓延、持续、旋转发出、迂回前进、向前、展现或者出现。

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It derives from the root word tan, which translates as "to extend, expand, spread, continue, spin out, weave; to put forth, show, or manifest."

它源自于词根“坦”，翻译起来就是延伸、扩展、蔓延、持续、旋转发出、迂回前进、向前、展现或者出现。

youdao