One of the biggest inconveniences of owning an electric vehicle【小题1】(be) how long it takes to recharge the batteries.【小题2】(depend) on the size of the battery and the speed of the recharging station, powering up a sustainable vehicle can take anywhere from 30 minutes to 12 hours.

Now, thanks to the latest technology, John Cushman and a team of researchers from Purdue University have developed the IFBattery: an【小题3】(instant) rechargeable battery that is safe, affordable, and environmentally friendly. Electric vehicle sales are growing worldwide and the【小题4】(popular) of companies like Tesla is incredible. However, the biggest challenge for the industry is to extend the life of a battery's charge and the infrastructure【小题5】(require) to actually charge the vehicle.

Designing and building enough of these recharging stations requires massive infrastructure development, 【小题6】means the energy distribution and storage system is being rebuilt at enormous cost to accommodate the need for continual local battery recharge. The IFBattery is developing an energy storage system that would enable drivers to fill up their electric vehicles【小题7】fluid electrolytes (液态电解质) to re-energize spent battery fluids much like refueling their gas tanks. As【小题8】(oppose) to burning gas,【小题9】 used battery fluids that power the battery can simply be transported to a solar or wind farm in order to【小题10】 (recharge).

CHANGCHUN, Oct. 21 (Xinhua)-Chinese train maker CRRC Changchun Railway Vehicles Co., Ltd. on Wednesday rolled out【小题1】 new type of high-speed train【小题2】 can run on different rail systems.

The train, with a standard speed of 400 km per hour, has been developed to cope【小题3】 different rail systems on international routes,【小题4】 (make) international rail travel more convenient.

The company said the train can operate in temperatures between minus 50 degrees Celsius【小题5】 50 degrees Celsius, and can also operate under different traction power supply systems and railway transportation standards of different countries.

【小题6】 (base) on the prototype and technology, the company is ready to take orders for customized high-speed trains and train products according to the technical standards and operational requirements of various regions of the world.

There are【小题7】 (current) four main railway track standards around the world. When ordinary trains run between countries with different gauges, they need to replace their train bogies, which takes time and effort.

As the new CRRC train【小题8】 (equip) with gauge-changing bogies, it can change【小题9】 (it) rail mode during cross-border travel, greatly improving the【小题10】 (efficient) of travel across rail systems.

A model of China's future double-decker bullet train (双层动车) was displayed by the Chinese Academy of Sciences on Monday, with experts 【小题1】 (say) it could reach very high speeds.

Zhang Weihua, 【小题2】 bullet train expert, told Science and Technology Daily that the double-decker bullet train will be able to run at the same top speed as a fast single-deck train. But an important problem 【小题3】 needs to be solved is that it may lose stability when turning at 【小题4】 (extreme) high speeds. But he believes that once design and technical problems such as the train's high center of gravity and large passenger capacity (容量) 【小题5】 (solve), the 【小题6】 (safe) will be fine when the train operates at proper speeds. Recently Germany and France 【小题7】 (plan) to use double-decker technology in the next generation of high-speed trains 【小题8】 the goal of improving passenger capacity and economic effectiveness.

China's double-decker bullet train, which is made 【小题9】 (aim) at the international market, will have a base speed of 160 km/h. However, when fitted with core components (核心组件) designed according to the current standards for high-speed trains, it will be capable of much 【小题10】 (high) speeds.