In fact, he once proposed an earthwork to the owners but was refused.

事实上，他曾向业主提出一个土方工程，但遭到了拒绝。

In spring 1970, Robert Smithson and Nancy Holt visited northern Utah to select a site to construct an earthwork.

1970年春，罗伯特·史密森和南希·霍尔特访问了犹他州北部，选择了一个土方工程的施工地点。

About 5,000 years ago, earthwork enclosures known as henges began to appear.

大约在 5000 年前，开始出现了被称为圆阵的土质围墙。

The earliest versions of Stonehenge were made of earthworks and ditches dug with tools made of antlers.

巨石阵最早的版本是由土木防御工事和鹿角做的工具挖出的壕沟所组成的。

Then in 1968, they took part in the legendary show " Earthworks" at the Virginia Dwan Gallery in New York.

1968年，他们参加了在纽约维吉尼亚德万画廊举办的“土方工程”传奇展览。

From around 3,800 BC they started building communal tombs called long barrows and large earthwork enclosures, which may have been gathering places.

从公元前 3800 年左右开始，他们开始建造被称为长形墓穴的公墓和大型土建围墙，这些地方可能是人群的聚集地。

All that remained was an earthwork fort that still stands here, in the trees not far from the shore.

剩下的只是一个土方堡垒，它仍然矗立在这里，在离海岸不远的树上。

Now, let's put all the information together: a large circular object surrounded by several earthworks and located across the Strait of Gibraltar.

现在，让我们把所有的信息放在一起：一个巨大的圆形物体，被几个土方工程包围，位于直布罗陀海峡对面。

These giant earthworks served as the foundations of what were likely some of the tallest standing structures in North America.

这些巨大的土方工程可能是北美一些最高的立式建筑的基础。

Smithson was a huge fan of science fiction, and in 1967, he took the title of Brian Aldiss' " Earthworks" to describe his own form of art.

史密森是科幻小说的超级粉丝，1967年，他用布莱恩·奥尔迪斯的《土方工程》来描述他自己的艺术形式。