Goodman's childhood listening had left him in no doubt that jazz's volatile fuel in this period had come from African-Americans.

古德曼在童年受过的爵士乐影响令他不可否定地认为，爵士乐前进的动力源泉来自非裔美国人。

Combustion was improved and HC emission was reduced at cold modes sudden loading operation conditions by using better volatile fuel with the same cetane number.

采用具有相同十六烷值、挥发性好的燃料，可有效改善冷态增负荷工况下的燃烧，降低HC排放。

A second component, for the medium-term, would scale up financing of energy projects to reduce a country's longer-term vulnerability to high and volatile fuel prices.

第二个中期组成部分将扩大对能源项目的资助，以提高国家承受高涨的和动荡的燃料价格的长期能力。