To help generate lift to keep midwater, the top of the tail extends farther back than the bottom, creating a slant along the back edge.

为了保持在水中不至于沉底，尾部的顶端比底端向后延伸，沿着后端形成一个斜面，产生提力。

youdao

Not so two walruses, all alone when we came across them lounging at the edge of an ice floe; both male and dead-weight huge, lying top and tail, comfortable, sleepy, their dignity somehow intact.

而两头海象却落落大方，它们都是雄性，体型庞大，舒服地躺在冰面上打瞌睡，而它们的优雅不减分毫。

youdao

An otter. A small animal that has four webbed feet, a flat tail and thick brown fur, living on the edge of a river.

水獭，是一种细小的动物，有四只有蹼的脚，一条扁平的尾巴，身上有厚的啡色毛皮，在河边生活。

youdao

It's not as gritty as the Z, but its longer wheelbase actually helps pin the tail end a bit better, so there's more grip at the very edge of the performance window.

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