根据魏的逻辑：由于可供选择的女性越来越少，父母们会有更加强烈的储蓄动机，以便让自己的儿子获得更有竞争力的婚姻前景。他们会一直这么做，直到儿子发育成熟并进入婚姻市场。
Wei's logic: With fewer available women, parents have a much stronger incentive to save to make their sons attractive marriage prospects, as do the sons as they mature and enter the marriage market.
第三，因为燃料电池发动机的使用费用比内燃机发动机低，燃料电池发动机很快就会在价格上很有竞争力了。
Third, fuel-cell engines will soon be economically competitive because people will spend less money to operate a fuel-cell engine than they will to operate an internal-combustion engine.
目前为止，氢燃料电池发动机是最有竞争力的汽车动力代替品。氢燃料电池发动机是用氢作燃料产生电能以充当汽车的动力。
By far, the most promising alternative source of energy for cars is the hydrogen-based fuel-cell engine, which USES hydrogen to create electricity that, in turn, powers the car.
徐工可以利用斗山在发动机方面的先进产品，强大实力和良好品牌形象，进一步提升徐工主机的竞争力。
Xugong can use doosan in engine of strong strength and advanced products, good brand image, and further enhance the competitiveness of hosts Germany.
目前为止，氢燃料电池发动机是最有竞争力的汽车动力代替品。氢燃料电池发动机是用氢作燃料产生电能以充当汽车的动力。
By far, the most promising alternative source of energy for cars is the hydrogen-based fuel-cell engine, which USES hydrogen to electricity that, in turn, powers the car.
本发明的可旋转电力电子变换器同步电机励磁装置能为同步电机提供稳定可调的直流励磁，可大大提升同步电动机调速系统的竞争力。
The disclosed excitation unit of rotatable electronic converter supplies stable adjustable dc excitation for synchro motor, promoting competitive power of speed control system of synchro motor.
本发明的可旋转电力电子变换器同步电机励磁装置能为同步电机提供稳定可调的直流励磁，可大大提升同步电动机调速系统的竞争力。
The disclosed excitation unit of rotatable electronic converter supplies stable adjustable dc excitation for synchro motor, promoting competitive power of speed control system of synchro motor.
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