The artists were highly skilled at using, or even enhancing, the natural shape of the cave walls to give depth and perspectives to their drawings, the sense of motion and vitality in these animals.

艺术家们高度熟练地使用，甚至增强了洞穴墙壁的自然形状，使他们的绘画具有深度和透视感，以及这些动物的动感和活力。

youdao

Upon looking at the problem closer, you can see, however, that the depth of the dependency graph tends to be shallow, and furthermore that some objects are natural endpoints.

但是，如果仔细考虑一下这个问题，就会发现依赖图的深度一般不大，而且某些对象是自然的端点。

youdao

Advanced biology students, for example, trekked tothe Black Rock Forest, in Orange County, N.Y., to measure snow depth, andfrequented the Museum of Natural History.

比如，生物学高级班的学生，需要长途跋涉到纽约州奥兰吉郡的黑岩森林去测量雪的厚度，经常出入自然历史博物馆。

youdao

Yet reaching this point has required significant deepening of the Savannah River, from its natural depth of 17 feet (5.2 metres) to 42 feet today.

ECONOMIST: Savannah's port

In 2008, Switzerland-based Manas Petroleum (MNAP) announced it found an estimated 3 billion barrels of oil and 3 trillion cubic feet of natural gas at depth.

FORBES: After The Gulf: Is Albania The Next Oil Frontier?

Natural search is highly affected by the depth of content.

FORBES: Michael Dell's Dorm Room Start-Up Summit