利用流体力学的相似原理，按一定的比例缩小构建出实物模型，这样可以节省试验费用和试验空间。

Finally using hydrodynamics similar principles and by reducing the proportion of a certain kind of model, which would save the cost of experiments and experimental space.

youdao

为用户提供了一个打破空间与地域限制的货币与实物的交换平台。

To provide users with a break of space and geographical restrictions of the currency and barter exchange platform.

youdao

它向社会提供的不是实物形态的产品，而是一种劳务，即旅客与货物的空间位移。

What it provides to the society is not real product, but a kind of service, i. e. space transfer of passengers and goods.

youdao

So first I'm gonna say something about identity across time or indeed initially identity across space with some familiar humdrum material objects.

所以我首先要,用一些大家熟悉的一般实物,谈谈贯穿时间,和贯穿空间中的人格。

耶鲁公开课 - 死亡课程节选