The so called feasibility means whether we have enough economiccapability to carry it out or whether it is worth spending so much money to make artificial soil and artificial land.
所谓现实性就是说我们有没有足够的经济能力去实施，值不值花那么多的资金去搞人造土壤，去搞人造土地。
2
On the contrary, air has no limitations on the working temperature and is quite friendly to the environment. But it has small thermal capacity, which leads to a reduction in the economiccapability.
而空气没有温度限制，并且对环境友好，但其热容量较小，导致经济性不好；
3
Measured by economic weight, technological capability or military prowess, the US will remain the pre-eminent power.