At the time, Jet controlled almost half the domestic market.
那时，捷达航空几乎控制国内市场的半壁江山。
2
Initially, algae oil will comprise only about half the mixture used for jet fuel.
最开始，藻类燃油将只占喷气燃料混合物的一半。
3
Much research has been driven by efforts to save jet fuel. Having more than doubled in price in recent years, it now accounts for about half of airlines' operating costs.