Head margin: the margin at the top of a page.

头白边：书页上边的空白部份。

youdao

The main production profit margin of medium-sized (100 ~ 499 head) feedlot was 18.02%, and highest among different scale feedlots. The management level of large-scale feedlots must be improved.

不同规模的牛场，主产品利润率以中型规模(100 ~ 499头)牛场最高，为18.02%，大型牛场经营管理水平有待提高。

youdao

Methods 12 cases of posterior acetabular margin fractura were treated with SR-PLLA screws. 4 cases complicated with femoral head fractura.

方法应用自身增强可吸收（SR-PLLA）螺钉内固定治疗髋臼后缘骨折12例，其中4例合并股骨头骨折。

youdao

But it turns out that London, Northern Ireland and, by a very narrow margin, the north-east of England, had a higher spend per head in 2010-11.

BBC: Scottish independence: Braveheart or iPad?

Even if his PML-N does not have an outright majority, its projected margin of victory suggests it will be in a much stronger position than the PPP was at the head of the outgoing coalition.

BBC: Pakistan vote: Nawaz Sharif in talks on new government

The President is enormously gratified that Senator Kerry was confirmed by such a substantial margin by his former colleagues and looks forward to what he expects to be excellent service as the head of the State Department.

WHITEHOUSE: Press Briefing