例句與造句

1. If the process of separating out the 3 He could employ as feedstock the liquefied helium typically used to transport and store bulk quantities, estimates for the incremental energy cost range from US $ 34 to $ 300 per liter NTP, excluding the cost of infrastructure and equipment.
2. It's difficult to find incremental energy costs in a sentence. 用incremental energy costs造句挺難的