Overall Sitemaps 0.90 protocol offers an improvement in terms of crawling efficiency that cannot be accomplished using regular sitemap references and robot directives combined.

总的来说，Sitemaps 0.90协议对爬行效率提供了改进，而常规站点地图引用和组合的机器指令无法完成这点。

youdao

The efficiency of a coal-fired thermal plant is typically in the range of 30%-35%. In a combined cycle gas turbine system running on natural gas, the maximum efficiency is in the range 45%-50%.

烧煤的热电厂的效率通常在30%到50%之间，使用天然气的联合循环燃气轮机系统最大效率在45%到50%之间，而很多专家认为高温燃料电池的效率可达到80%至85%。

youdao

New types of tiny combined heat and power plants are able to turn about half the energy in fuel into electricity, almost matching the efficiency of huge generators.

新型的小规模热电联产机组，能够将燃料中大约一半的能量转化为电力，其效率已与大型发电机的效率相若。

youdao

The Ford Focus Electric has received a 110 MPG equivalent fuel efficiency rating in the city and a combined fuel efficiency of 105 MPGe, 6 MPGe more than the all-electric Nissan Leaf.

FORBES: Ford Dealerships Prepare for the Focus Electric

All three trim levels have a V6, 3.6L engine that gets 288 horsepower and a combined fuel efficiency of 20.5 miles per gallon.

FORBES: Most Value-Packed Cars

The 4-cylinder vans will get a combined fuel efficiency of 25 miles per gallon, nearly double what the Ford Crown Victoria gets.

FORBES: Nissan To Be Next Supplier of New York City Taxi Cabs