It isn't clear whether the plane went down over land or sea.

不清楚飞机是落在陆地上还是海里。

《柯林斯英汉双解大词典》

The main problem with algae, whether grown on land or sea, is how to get enough of it.

其实不论是种在海上还是陆地上，海藻最大的问题是如何才能获得足够的量。

youdao

Ultimately, he wants "every single location" on Earth, land or sea, to have information.

最终，他希望地球上的不论海洋还是陆地，“每一个角落”都有信息。

youdao

Instead,you should use sand from rivers or from other areas of land that are not near the sea.

VOA: special.2009.09.14

Until now, insecurity has made it hard to provide any aid by land or sea.

ECONOMIST: Somalia

When snow or ice melt, they are replaced by darker melt-water pools, land or sea.

ECONOMIST: Global warming

Most cross land or sea borders illegally, he says, but 150, 000 overstay their visas.

ECONOMIST: Who gets in