net energy gain
常見例句
- Furthermore, ethanol requires a tremendous amount of fossil fuels to produce. The net energy gain is not terribly high.
此外乙醇的制造得耗用大量石化燃料，兩相抵扣之后、我們最后得到的乾凈能源量其實并沒那麼高。 - Energy efficiency(net energy gain or energy ratio) of corn-based ethanol as a substitute for fossil fuel is an important criteria for assessing its sustainability.
玉米燃料乙醇作為化石燃料的替代品，能量效率（凈能量或能量比）是評價其可持續(xù)性的一個重要標準。 - So we can compare the two electron configurations, and we can actually think about what we figure out from them, we see that two are lowered in energy, two electrons are raised in energy, so we have no net gain or no net loss in energy for h e 2.
我們可以比較兩種電子構(gòu)型，我們可以考慮,我們發(fā)現(xiàn)這，兩個電子能量變低，兩個電子能量升高，所以在He2里沒有凈的能量得失。
麻省理工公開課 - 化學原理課程節(jié)選 - This results in an energy efficiency of more than 100 percent — a net energy gain.
FORBES: Could Hydrogen Breakthrough Revive The Fuel-Cell Car? 返回 net energy gain