Its position is on the vertical centre line , about 2/5 of the page depth from the head of the page.

它的位置在垂直分中线上，从天头计，书页深度5分之2的地方。

youdao

Its position is on the vertical centre line , about 2/5 of the page depth from the head of the page.

它的位置在垂直分中线上，从天头计，书页深度5分之2的地方。

youdao