But hauling tons of equipment to the moon to make fuel and build a life support system for a moon base, wouldn't that be too expensive?

但是把成吨的设备运到月球去制造燃料，并为月球基地建造一个生命维持系统，那不是太贵了吗？

youdao

At its base was a life-size model elephant.

在它的基座有一个实物大小的大象模型。

youdao

The question for Africa is whether this is true in countries without an industrial base or much history of city life.

但摆在非洲面前的问题是，这一经验对没有工业基础或城市历史的国家是否适用。

youdao

One time,after World War Two ended, he brought his radio show to soldiers waiting at a base in California to return to civilian life.

VOA: special.2009.03.09

Oxygen could be derived from ilmanite reserves there and water could be extracted to make rocket fuel or sustain life on a base.

CNN: Mining the moon for a nuclear future

This will be pushed from 100 base pairs now to 400 next year, Life says.

FORBES: Life Tech Pushes Speed Of Small, Fast DNA Sequencer

Macdonalds' client base includes national and local house builders, life assurance companies, pension providers and charities.

BBC: Morton Fraser headquarters