His shoes dragged him down, and he could barely keep his head above water.

他的鞋把他往水里拽，他几乎不能让他的头伸到水面上了。

The cotton dress tied itself round his legs, trying to pull him under, and Toad had to fight to keep his head above water.

河水带着他向前流，一会儿把他推到这边，一会儿又推到那边。棉布外套裹住了他的腿，将他向下拽，他不得不挣扎着让头浮在水面上。

A man who loses his job tries to keep his head above water until he finds a new job. " Water over the dam" is another expression about a past event.

一个失业者在找到新工作之前往往也尽力保持头浮出水面。 “水漫过了水坝”是个有关于过去某事件的表达。

Dazed and bruised, but miraculously still alive, Harrison held on to an overturned washbasin to keep his head above water in the four foot square bathroom.

遍体鳞伤，但奇迹般地还活着，他抓住一个翻倒的洗脸盆， 让自己的头露出水面。