“经济地”造句

他们未能经济地经营电话网络.
They were unable to run the telephone network economically.

产生激光光子的费用太高,因此,不能用它很经济地制造出大多数化合物.
Producing laser photons is too expensive to make most compounds economically.

目的是使树冠保持在一定的高度和宽度的范围内,更经济地管理.
The purpose is to keep the tree within height and width bounds for more economical management.

• #经济地